{"id":6783,"date":"2025-07-14T01:00:59","date_gmt":"2025-07-14T01:00:59","guid":{"rendered":"https:\/\/astronomia.udp.cl\/?page_id=6783"},"modified":"2025-08-21T17:51:16","modified_gmt":"2025-08-21T17:51:16","slug":"quasars-and-hot-dogs","status":"publish","type":"page","link":"https:\/\/astronomia.udp.cl\/en\/research\/areas\/quasars-and-hot-dogs\/","title":{"rendered":"Quasars and Hot DOGs"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"6783\" class=\"elementor elementor-6783\" data-elementor-settings=\"{&quot;ha_cmc_init_switcher&quot;:&quot;no&quot;}\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-5f24a40 elementor-section-height-min-height elementor-section-boxed elementor-section-height-default elementor-section-items-middle\" data-id=\"5f24a40\" data-element_type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;,&quot;_ha_eqh_enable&quot;:false}\">\n\t\t\t\t\t\t\t<div class=\"elementor-background-overlay\"><\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-no\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-54169a4\" data-id=\"54169a4\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-b9229d6 elementor-widget elementor-widget-heading\" data-id=\"b9229d6\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.20.0 - 13-03-2024 *\/\n.elementor-heading-title{padding:0;margin:0;line-height:1}.elementor-widget-heading .elementor-heading-title[class*=elementor-size-]>a{color:inherit;font-size:inherit;line-height:inherit}.elementor-widget-heading .elementor-heading-title.elementor-size-small{font-size:15px}.elementor-widget-heading .elementor-heading-title.elementor-size-medium{font-size:19px}.elementor-widget-heading .elementor-heading-title.elementor-size-large{font-size:29px}.elementor-widget-heading .elementor-heading-title.elementor-size-xl{font-size:39px}.elementor-widget-heading .elementor-heading-title.elementor-size-xxl{font-size:59px}<\/style><h1 class=\"elementor-heading-title elementor-size-default\">High-redshift Quasars and Hot DOGs<\/h1>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-b48d734 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"b48d734\" data-element_type=\"section\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-0f78de2\" data-id=\"0f78de2\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-6fa04ba elementor-widget elementor-widget-heading\" data-id=\"6fa04ba\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Research Projects<\/h4>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-336f287 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"336f287\" data-element_type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;,&quot;_ha_eqh_enable&quot;:&quot;yes&quot;,&quot;_ha_eqh_to&quot;:&quot;widget&quot;,&quot;_ha_eqh_disable_on_tablet&quot;:&quot;no&quot;,&quot;_ha_eqh_disable_on_mobile&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-66 elementor-top-column elementor-element elementor-element-29d560f\" data-id=\"29d560f\" data-element_type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-199d1a0   elementor-widget__width-initial premium-modal-dismissible-yes elementor-widget elementor-widget-premium-addon-modal-box\" data-id=\"199d1a0\" data-element_type=\"widget\" data-settings=\"{&quot;premium_modal_box_animation&quot;:&quot;zoomIn&quot;}\" data-widget_type=\"premium-addon-modal-box.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\n\t\t<div class=\"premium-modal-box-container\" data-settings=\"{&quot;trigger&quot;:&quot;text&quot;,&quot;show_on_exit&quot;:false}\">\n\t\t\t<div class=\"premium-modal-trigger-container\">\n\t\t\t\t\t\t\t\t\t<span data-toggle=\"premium-modal\" data-target=\"#premium-modal-199d1a0\" class=\"premium-modal-trigger-text\">\n\t\t\t\t\t\t<div >\n\t\t\t\t\t\t\tA MUSE view of high-redshift radio-loud quasars\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t<\/div>\n\n\t\t\t<div id=\"premium-modal-199d1a0\" class=\"premium-modal-box-modal\"\n\t\t\trole=\"dialog\"\n\t\t\tstyle=\"display: none\"\n\t\t\t>\n\t\t\t\t<div class=\"premium-modal-box-modal-dialog\" data-delay-animation=\"\" data-modal-animation=\"zoomIn animated-\">\n\t\t\t\t\t\t\t\t\t\t\t<div class=\"premium-modal-box-modal-header\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"premium-modal-box-modal-title\">\n\t\t\t\t\t\t\t\t\tA MUSE view of high-redshift radio-loud quasars\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"premium-modal-box-close-button-container\">\n\t\t\t\t\t\t\t\t\t<button type=\"button\" class=\"premium-modal-box-modal-close\" data-dismiss=\"premium-modal\">&times;<\/button>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<div class=\"premium-modal-box-modal-body\">\n\t\t\t\t\t\t<p style=\"text-align: left;\">In this project, we focus on a sample of radio-loud quasars at z &gt; 3.5 with deep VLT\/MUSE data. We study the properties of their circumgalactic medium and closest environments, by inspecting for the presence of Lyman Alpha Halos and close-by Lyman Alpha Emitters. We will compare such results with what is observed in quasars with no strong radio emission (radio-quiet).<\/p>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/div>\n\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-33 elementor-top-column elementor-element elementor-element-a0e9572\" data-id=\"a0e9572\" data-element_type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-a192bc3 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"a192bc3\" data-element_type=\"section\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-9805453\" data-id=\"9805453\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-dc25f5c elementor-view-stacked elementor-widget-mobile__width-initial elementor-shape-circle elementor-widget elementor-widget-icon\" data-id=\"dc25f5c\" data-element_type=\"widget\" data-widget_type=\"icon.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-icon-wrapper\">\n\t\t\t<div class=\"elementor-icon\">\n\t\t\t<i aria-hidden=\"true\" class=\"hm hm-team-member\"><\/i>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-e5f5e54\" data-id=\"e5f5e54\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-abe9012 elementor-widget elementor-widget-heading\" data-id=\"abe9012\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h6 class=\"elementor-heading-title elementor-size-default\">People<\/h6>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<div class=\"elementor-element elementor-element-e5c2c95 elementor-widget__width-initial dark-background-links elementor-widget elementor-widget-text-editor\" data-id=\"e5c2c95\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.20.0 - 13-03-2024 *\/\n.elementor-widget-text-editor.elementor-drop-cap-view-stacked .elementor-drop-cap{background-color:#69727d;color:#fff}.elementor-widget-text-editor.elementor-drop-cap-view-framed .elementor-drop-cap{color:#69727d;border:3px solid;background-color:transparent}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap{margin-top:8px}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap-letter{width:1em;height:1em}.elementor-widget-text-editor .elementor-drop-cap{float:left;text-align:center;line-height:1;font-size:50px}.elementor-widget-text-editor .elementor-drop-cap-letter{display:inline-block}<\/style>\t\t\t\t<ul><li style=\"text-align: left;\"><a href=\"https:\/\/astronomia.udp.cl\/en\/researcher\/chiara-mazzucchelli\/\" target=\"_blank\" rel=\"noopener\">Dr. Chiara Mazzucchelli<\/a><\/li><\/ul>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-344e165 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"344e165\" data-element_type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;,&quot;_ha_eqh_enable&quot;:&quot;yes&quot;,&quot;_ha_eqh_to&quot;:&quot;widget&quot;,&quot;_ha_eqh_disable_on_tablet&quot;:&quot;no&quot;,&quot;_ha_eqh_disable_on_mobile&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-66 elementor-top-column elementor-element elementor-element-149779e\" data-id=\"149779e\" data-element_type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-63d3348   elementor-widget__width-initial premium-modal-dismissible-yes elementor-widget elementor-widget-premium-addon-modal-box\" data-id=\"63d3348\" data-element_type=\"widget\" data-settings=\"{&quot;premium_modal_box_animation&quot;:&quot;zoomIn&quot;}\" data-widget_type=\"premium-addon-modal-box.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\n\t\t<div class=\"premium-modal-box-container\" data-settings=\"{&quot;trigger&quot;:&quot;text&quot;,&quot;show_on_exit&quot;:false}\">\n\t\t\t<div class=\"premium-modal-trigger-container\">\n\t\t\t\t\t\t\t\t\t<span data-toggle=\"premium-modal\" data-target=\"#premium-modal-63d3348\" class=\"premium-modal-trigger-text\">\n\t\t\t\t\t\t<div >\n\t\t\t\t\t\t\tThe Properties of high-redshift Radio-Loud Quasars in the Epoch of Reionization\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t<\/div>\n\n\t\t\t<div id=\"premium-modal-63d3348\" class=\"premium-modal-box-modal\"\n\t\t\trole=\"dialog\"\n\t\t\tstyle=\"display: none\"\n\t\t\t>\n\t\t\t\t<div class=\"premium-modal-box-modal-dialog\" data-delay-animation=\"\" data-modal-animation=\"zoomIn animated-\">\n\t\t\t\t\t\t\t\t\t\t\t<div class=\"premium-modal-box-modal-header\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"premium-modal-box-modal-title\">\n\t\t\t\t\t\t\t\t\tThe Properties of high-redshift Radio-Loud Quasars in the Epoch of Reionization\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"premium-modal-box-close-button-container\">\n\t\t\t\t\t\t\t\t\t<button type=\"button\" class=\"premium-modal-box-modal-close\" data-dismiss=\"premium-modal\">&times;<\/button>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<div class=\"premium-modal-box-modal-body\">\n\t\t\t\t\t\t<p style=\"text-align: left;\">This project focuses on understanding several physical properties of powerful quasars showing strong radio emission (radio-loud) in the Epoch of Reionization (z~6). We are interested in studying their large-scale environments where these objects are found, predicted to be very rich. In order to do this, as a start, we will inspect the fields of three sources, using deep imaging data from HST and VLT\/FORS2, and spectroscopy from Magellan\/LDSS3.\u00a0 We will also inspect the properties of their host galaxies, as imaged by ALMA (5 sources), and of their innermost regions (5 sources; VLT\/X-Shooter data to be taken in ESO P112).<\/p>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/div>\n\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-33 elementor-top-column elementor-element elementor-element-032bb4e\" data-id=\"032bb4e\" data-element_type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-d94fcb7 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"d94fcb7\" data-element_type=\"section\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-704b355\" data-id=\"704b355\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-db5ebee elementor-view-stacked elementor-widget-mobile__width-initial elementor-shape-circle elementor-widget elementor-widget-icon\" data-id=\"db5ebee\" data-element_type=\"widget\" data-widget_type=\"icon.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-icon-wrapper\">\n\t\t\t<div class=\"elementor-icon\">\n\t\t\t<i aria-hidden=\"true\" class=\"hm hm-team-member\"><\/i>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-1255797\" data-id=\"1255797\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-aa657ac elementor-widget elementor-widget-heading\" data-id=\"aa657ac\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h6 class=\"elementor-heading-title elementor-size-default\">People<\/h6>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<div class=\"elementor-element elementor-element-5d9b6fc elementor-widget__width-initial dark-background-links elementor-widget elementor-widget-text-editor\" data-id=\"5d9b6fc\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<ul><li style=\"text-align: left;\"><a href=\"https:\/\/astronomia.udp.cl\/en\/researcher\/chiara-mazzucchelli\/\" target=\"_blank\" rel=\"noopener\">Dr. Chiara Mazzucchelli<\/a><\/li><\/ul>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-a226a58 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"a226a58\" data-element_type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;,&quot;_ha_eqh_enable&quot;:&quot;yes&quot;,&quot;_ha_eqh_to&quot;:&quot;widget&quot;,&quot;_ha_eqh_disable_on_tablet&quot;:&quot;no&quot;,&quot;_ha_eqh_disable_on_mobile&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-66 elementor-top-column elementor-element elementor-element-a4ee143\" data-id=\"a4ee143\" data-element_type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-7eb964f   elementor-widget__width-initial premium-modal-dismissible-yes elementor-widget elementor-widget-premium-addon-modal-box\" data-id=\"7eb964f\" data-element_type=\"widget\" data-settings=\"{&quot;premium_modal_box_animation&quot;:&quot;zoomIn&quot;}\" data-widget_type=\"premium-addon-modal-box.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\n\t\t<div class=\"premium-modal-box-container\" data-settings=\"{&quot;trigger&quot;:&quot;text&quot;,&quot;show_on_exit&quot;:false}\">\n\t\t\t<div class=\"premium-modal-trigger-container\">\n\t\t\t\t\t\t\t\t\t<span data-toggle=\"premium-modal\" data-target=\"#premium-modal-7eb964f\" class=\"premium-modal-trigger-text\">\n\t\t\t\t\t\t<div >\n\t\t\t\t\t\t\tSelecting high-redshift quasars candidates for the 4MOST survey \u201cChANGES\u201d\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t<\/div>\n\n\t\t\t<div id=\"premium-modal-7eb964f\" class=\"premium-modal-box-modal\"\n\t\t\trole=\"dialog\"\n\t\t\tstyle=\"display: none\"\n\t\t\t>\n\t\t\t\t<div class=\"premium-modal-box-modal-dialog\" data-delay-animation=\"\" data-modal-animation=\"zoomIn animated-\">\n\t\t\t\t\t\t\t\t\t\t\t<div class=\"premium-modal-box-modal-header\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"premium-modal-box-modal-title\">\n\t\t\t\t\t\t\t\t\tSelecting high-redshift quasars candidates for the 4MOST survey \u201cChANGES\u201d\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"premium-modal-box-close-button-container\">\n\t\t\t\t\t\t\t\t\t<button type=\"button\" class=\"premium-modal-box-modal-close\" data-dismiss=\"premium-modal\">&times;<\/button>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<div class=\"premium-modal-box-modal-body\">\n\t\t\t\t\t\t<p style=\"text-align: left;\">In this project, we compile a catalog of high-redshift (z&gt;5.5) quasars candidates to be followed up by 4MOST as part of the Chilean survey \u201cChANGES\u201d (Chilean AGN\/Galaxy Extragalactic Survey). We use a selection based on available optical\/NIR large-area sky surveys, and on a custom-made spectral energy distribution routine.<\/p>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/div>\n\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-33 elementor-top-column elementor-element elementor-element-43ce2e0\" data-id=\"43ce2e0\" data-element_type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-c9b666a elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"c9b666a\" data-element_type=\"section\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-ca12608\" data-id=\"ca12608\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-2da1f25 elementor-view-stacked elementor-widget-mobile__width-initial elementor-shape-circle elementor-widget elementor-widget-icon\" data-id=\"2da1f25\" data-element_type=\"widget\" data-widget_type=\"icon.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-icon-wrapper\">\n\t\t\t<div class=\"elementor-icon\">\n\t\t\t<i aria-hidden=\"true\" class=\"hm hm-team-member\"><\/i>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-d20ac46\" data-id=\"d20ac46\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-e609743 elementor-widget elementor-widget-heading\" data-id=\"e609743\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h6 class=\"elementor-heading-title elementor-size-default\">People<\/h6>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<div class=\"elementor-element elementor-element-0b3bc47 elementor-widget__width-initial dark-background-links elementor-widget elementor-widget-text-editor\" data-id=\"0b3bc47\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<ul><li style=\"text-align: left;\"><a href=\"https:\/\/astronomia.udp.cl\/en\/researcher\/chiara-mazzucchelli\/\" target=\"_blank\" rel=\"noopener\">Dr. Chiara Mazzucchelli<\/a><\/li><li><a href=\"https:\/\/astronomia.udp.cl\/en\/researcher\/roberto-j-assef\/\" target=\"_blank\" rel=\"noopener\">Dr. Roberto Assef<\/a><\/li><\/ul>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-0703549 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"0703549\" data-element_type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;,&quot;_ha_eqh_enable&quot;:&quot;yes&quot;,&quot;_ha_eqh_to&quot;:&quot;widget&quot;,&quot;_ha_eqh_disable_on_tablet&quot;:&quot;no&quot;,&quot;_ha_eqh_disable_on_mobile&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-66 elementor-top-column elementor-element elementor-element-9fee298\" data-id=\"9fee298\" data-element_type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-3379915   elementor-widget__width-initial premium-modal-dismissible-yes elementor-widget elementor-widget-premium-addon-modal-box\" data-id=\"3379915\" data-element_type=\"widget\" data-settings=\"{&quot;premium_modal_box_animation&quot;:&quot;zoomIn&quot;}\" data-widget_type=\"premium-addon-modal-box.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\n\t\t<div class=\"premium-modal-box-container\" data-settings=\"{&quot;trigger&quot;:&quot;text&quot;,&quot;show_on_exit&quot;:false}\">\n\t\t\t<div class=\"premium-modal-trigger-container\">\n\t\t\t\t\t\t\t\t\t<span data-toggle=\"premium-modal\" data-target=\"#premium-modal-3379915\" class=\"premium-modal-trigger-text\">\n\t\t\t\t\t\t<div >\n\t\t\t\t\t\t\tSelecting 4MOST ChANGES Targets based on their SEDs\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t<\/div>\n\n\t\t\t<div id=\"premium-modal-3379915\" class=\"premium-modal-box-modal\"\n\t\t\trole=\"dialog\"\n\t\t\tstyle=\"display: none\"\n\t\t\t>\n\t\t\t\t<div class=\"premium-modal-box-modal-dialog\" data-delay-animation=\"\" data-modal-animation=\"zoomIn animated-\">\n\t\t\t\t\t\t\t\t\t\t\t<div class=\"premium-modal-box-modal-header\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"premium-modal-box-modal-title\">\n\t\t\t\t\t\t\t\t\tSelecting 4MOST ChANGES Targets based on their SEDs\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"premium-modal-box-close-button-container\">\n\t\t\t\t\t\t\t\t\t<button type=\"button\" class=\"premium-modal-box-modal-close\" data-dismiss=\"premium-modal\">&times;<\/button>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<div class=\"premium-modal-box-modal-body\">\n\t\t\t\t\t\t<p style=\"text-align: left;\">4MOST is an upcoming spectroscopic survey that throughout 5 years will obtain spectra of tens of millions of sources in the southern hemisphere. 4MOST is divided among many public surveys, including the Chilean AGN and Galaxy Evolution Survey (ChANGES). This public survey will obtain spectra of millions of active galactic nuclei, or AGN, selected in a number of different ways. In this project, we are leading the selection of AGN candidates based on their spectral energy distributions that will form about 50% of the final sample of ChANGES.<\/p>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/div>\n\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-33 elementor-top-column elementor-element elementor-element-104ecb7\" data-id=\"104ecb7\" data-element_type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-94917b6 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"94917b6\" data-element_type=\"section\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-02549f0\" data-id=\"02549f0\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-22b1216 elementor-view-stacked elementor-widget-mobile__width-initial elementor-shape-circle elementor-widget elementor-widget-icon\" data-id=\"22b1216\" data-element_type=\"widget\" data-widget_type=\"icon.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-icon-wrapper\">\n\t\t\t<div class=\"elementor-icon\">\n\t\t\t<i aria-hidden=\"true\" class=\"hm hm-team-member\"><\/i>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-55db2ee\" data-id=\"55db2ee\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-992d17d elementor-widget elementor-widget-heading\" data-id=\"992d17d\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h6 class=\"elementor-heading-title elementor-size-default\">People<\/h6>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<div class=\"elementor-element elementor-element-f3c4047 elementor-widget__width-initial dark-background-links elementor-widget elementor-widget-text-editor\" data-id=\"f3c4047\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<ul><li style=\"text-align: left;\"><a href=\"https:\/\/astronomia.udp.cl\/en\/researcher\/chiara-mazzucchelli\/\" target=\"_blank\" rel=\"noopener\">Dr. Chiara Mazzucchelli<\/a><\/li><li><a href=\"https:\/\/astronomia.udp.cl\/en\/researcher\/roberto-j-assef\/\" target=\"_blank\" rel=\"noopener\">Dr. Roberto Assef<\/a><\/li><\/ul>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-699f982 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"699f982\" data-element_type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;,&quot;_ha_eqh_enable&quot;:&quot;yes&quot;,&quot;_ha_eqh_to&quot;:&quot;widget&quot;,&quot;_ha_eqh_disable_on_tablet&quot;:&quot;no&quot;,&quot;_ha_eqh_disable_on_mobile&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-66 elementor-top-column elementor-element elementor-element-52d548d\" data-id=\"52d548d\" data-element_type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-589e2ac   elementor-widget__width-initial premium-modal-dismissible-yes elementor-widget elementor-widget-premium-addon-modal-box\" data-id=\"589e2ac\" data-element_type=\"widget\" data-settings=\"{&quot;premium_modal_box_animation&quot;:&quot;zoomIn&quot;}\" data-widget_type=\"premium-addon-modal-box.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\n\t\t<div class=\"premium-modal-box-container\" data-settings=\"{&quot;trigger&quot;:&quot;text&quot;,&quot;show_on_exit&quot;:false}\">\n\t\t\t<div class=\"premium-modal-trigger-container\">\n\t\t\t\t\t\t\t\t\t<span data-toggle=\"premium-modal\" data-target=\"#premium-modal-589e2ac\" class=\"premium-modal-trigger-text\">\n\t\t\t\t\t\t<div >\n\t\t\t\t\t\t\tMerger Signatures in Hot Dust Obscured Galaxies\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t<\/div>\n\n\t\t\t<div id=\"premium-modal-589e2ac\" class=\"premium-modal-box-modal\"\n\t\t\trole=\"dialog\"\n\t\t\tstyle=\"display: none\"\n\t\t\t>\n\t\t\t\t<div class=\"premium-modal-box-modal-dialog\" data-delay-animation=\"\" data-modal-animation=\"zoomIn animated-\">\n\t\t\t\t\t\t\t\t\t\t\t<div class=\"premium-modal-box-modal-header\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"premium-modal-box-modal-title\">\n\t\t\t\t\t\t\t\t\tMerger Signatures in Hot Dust Obscured Galaxies\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"premium-modal-box-close-button-container\">\n\t\t\t\t\t\t\t\t\t<button type=\"button\" class=\"premium-modal-box-modal-close\" data-dismiss=\"premium-modal\">&times;<\/button>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<div class=\"premium-modal-box-modal-body\">\n\t\t\t\t\t\t<p style=\"text-align: left;\">Hot Dust Obscured Galaxies, or Hot DOGs, are some of the most luminous obscured quasars known in the Universe. Quasars and mergers, in general, are expected to play a major role in the evolution of massive galaxies. The idea is that mergers are able to drive gas down from the ISM into the central supermassive black holes, ignite an intense episode of accretion (known as as quasar) that is at first completely dust obscured, but eventually the pressure from the photons and\/or radio jets removes some of this dust, moving onto the traditional quasar phase, and eventually shuts down star formation in the galaxy. A number of studies (e.g., Stern et al. 2014, Tsai et al. 2015, 2018, Assef et al. 2015, 2022, Diaz-Santos et al. 2016, Wu et al. 2018, Zewdie et al. 2023) we shown that Hot DOGs and their environments have characteristic that make it likely that these objects correspond to that first phase of the evolution, when the very intense accretion is completely dust enshrouded. Diaz-Santos et al. (2018) dramatically showed that this picture is likely in place for the most luminous Hot DOG known, W2246-0526, by finding that the Hot DOG is at the center of a multiple merger, with dusty tidal tails joining it to its three nearest neighbors. In this project, we have carried out similar observations to those from Diaz-Santos et al. (2018) in a sample of 4 more Hot DOGs to determine if these structures are commonly observed in these objects.<\/p>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/div>\n\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-33 elementor-top-column elementor-element elementor-element-93dd533\" data-id=\"93dd533\" data-element_type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-364f79f elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"364f79f\" data-element_type=\"section\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-43ee85c\" data-id=\"43ee85c\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-a86cb3b elementor-view-stacked elementor-widget-mobile__width-initial elementor-shape-circle elementor-widget elementor-widget-icon\" data-id=\"a86cb3b\" data-element_type=\"widget\" data-widget_type=\"icon.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-icon-wrapper\">\n\t\t\t<div class=\"elementor-icon\">\n\t\t\t<i aria-hidden=\"true\" class=\"hm hm-team-member\"><\/i>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-d329ba7\" data-id=\"d329ba7\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-3183589 elementor-widget elementor-widget-heading\" data-id=\"3183589\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h6 class=\"elementor-heading-title elementor-size-default\">People<\/h6>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<div class=\"elementor-element elementor-element-9940c2f elementor-widget__width-initial dark-background-links elementor-widget elementor-widget-text-editor\" data-id=\"9940c2f\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<ul><li style=\"text-align: left;\"><a href=\"https:\/\/astronomia.udp.cl\/en\/researcher\/roberto-j-assef\/\" target=\"_blank\" rel=\"noopener\">Dr. Roberto Assef<\/a><\/li><li><a href=\"https:\/\/astronomia.udp.cl\/en\/researcher\/manuel-aravena\/\" target=\"_blank\" rel=\"noopener\">Dr. Manuel Aravena<\/a><\/li><\/ul>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-8cb6a8a elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"8cb6a8a\" data-element_type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;,&quot;_ha_eqh_enable&quot;:&quot;yes&quot;,&quot;_ha_eqh_to&quot;:&quot;widget&quot;,&quot;_ha_eqh_disable_on_tablet&quot;:&quot;no&quot;,&quot;_ha_eqh_disable_on_mobile&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-66 elementor-top-column elementor-element elementor-element-3fa0887\" data-id=\"3fa0887\" data-element_type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-9576ea4   elementor-widget__width-initial premium-modal-dismissible-yes elementor-widget elementor-widget-premium-addon-modal-box\" data-id=\"9576ea4\" data-element_type=\"widget\" data-settings=\"{&quot;premium_modal_box_animation&quot;:&quot;zoomIn&quot;}\" data-widget_type=\"premium-addon-modal-box.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\n\t\t<div class=\"premium-modal-box-container\" data-settings=\"{&quot;trigger&quot;:&quot;text&quot;,&quot;show_on_exit&quot;:false}\">\n\t\t\t<div class=\"premium-modal-trigger-container\">\n\t\t\t\t\t\t\t\t\t<span data-toggle=\"premium-modal\" data-target=\"#premium-modal-9576ea4\" class=\"premium-modal-trigger-text\">\n\t\t\t\t\t\t<div >\n\t\t\t\t\t\t\tImaging Polarimetry of Blue Excess Hot Dust Obscured Galaxies\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t<\/div>\n\n\t\t\t<div id=\"premium-modal-9576ea4\" class=\"premium-modal-box-modal\"\n\t\t\trole=\"dialog\"\n\t\t\tstyle=\"display: none\"\n\t\t\t>\n\t\t\t\t<div class=\"premium-modal-box-modal-dialog\" data-delay-animation=\"\" data-modal-animation=\"zoomIn animated-\">\n\t\t\t\t\t\t\t\t\t\t\t<div class=\"premium-modal-box-modal-header\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"premium-modal-box-modal-title\">\n\t\t\t\t\t\t\t\t\tImaging Polarimetry of Blue Excess Hot Dust Obscured Galaxies\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"premium-modal-box-close-button-container\">\n\t\t\t\t\t\t\t\t\t<button type=\"button\" class=\"premium-modal-box-modal-close\" data-dismiss=\"premium-modal\">&times;<\/button>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<div class=\"premium-modal-box-modal-body\">\n\t\t\t\t\t\t<p style=\"text-align: left;\">Hot Dust Obscured Galaxies represent a significant fraction of the most luminous heavily obscured quasars known in the Universe. A small subset of them, referred to as BHDs, show excess blue emission, thought to arise from scattered light from the highly obscured quasar. Detailed studies of three of these objects (Assef et al. 2016, 2020) using observations of their morphology with the Hubble Space Telescope, of the X-ray emission with the Chandra Space Telescope, of their UV through mid-IR spectra energy distributions and of their UV emission lines led to the conclusion that the blue excess is due to scattered light from the obscured quasar that powers the mid-IR. Specifically, we find that about 1% of the light from the obscured central engine escapes in some direction and is then scattered into our line of sight. The AGN is so luminous that just 1% of its luminosity is enough to completely hide the host galaxy underneath it. Recently, in Assef et al. (2022), we used imaging polarimetric observations with FORS2 at VLT in the R band of one BHD (W0116-0505, z=3.173) to confirm the nature of the blue excess as scattered light and derive properties of the scattering medium. Our preferred model is that the scatterer is a massive outflow wind driven by the quasar detected by Finnerty et al. (2020) and that may carry over 1,000 M_sun\/year of gas. In this project, we are obtaining further imaging polarimetric (ImPol) observations of BHDs using FORS2 at VLT. First, we will obtain V and I ImPol observations of W0116\u20130505 to better constrain the nature of the scattering material. We will also obtain ImPol observations in R of four additional BHDs to evaluate the prevalence of high polarization fractions in these objects, determine whether all can be modeled with the same physical parameters, as well as assess the possible relation with massive gaseous outflows to test a recent proposed scenario for the evolutionary sequence of luminous quasars. The observations are underway as part of an A-ranked proposal in the 2023A and B semesters.\u00a0<\/p>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/div>\n\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-33 elementor-top-column elementor-element elementor-element-24e8211\" data-id=\"24e8211\" data-element_type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-097bb77 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"097bb77\" data-element_type=\"section\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-88862d4\" data-id=\"88862d4\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-46f76f8 elementor-view-stacked elementor-widget-mobile__width-initial elementor-shape-circle elementor-widget elementor-widget-icon\" data-id=\"46f76f8\" data-element_type=\"widget\" data-widget_type=\"icon.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-icon-wrapper\">\n\t\t\t<div class=\"elementor-icon\">\n\t\t\t<i aria-hidden=\"true\" class=\"hm hm-team-member\"><\/i>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-20a6ebd\" data-id=\"20a6ebd\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-a7f28d8 elementor-widget elementor-widget-heading\" data-id=\"a7f28d8\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h6 class=\"elementor-heading-title elementor-size-default\">People<\/h6>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<div class=\"elementor-element elementor-element-714f37e elementor-widget__width-initial dark-background-links elementor-widget elementor-widget-text-editor\" data-id=\"714f37e\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<ul><li style=\"text-align: left;\"><a href=\"https:\/\/astronomia.udp.cl\/en\/researcher\/roberto-j-assef\/\" target=\"_blank\" rel=\"noopener\">Dr. Roberto Assef<\/a><\/li><\/ul>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-ef9a519 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"ef9a519\" data-element_type=\"section\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-2841bd7\" data-id=\"2841bd7\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-b89af8f elementor-widget elementor-widget-spacer\" data-id=\"b89af8f\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.20.0 - 13-03-2024 *\/\n.elementor-column .elementor-spacer-inner{height:var(--spacer-size)}.e-con{--container-widget-width:100%}.e-con-inner>.elementor-widget-spacer,.e-con>.elementor-widget-spacer{width:var(--container-widget-width,var(--spacer-size));--align-self:var(--container-widget-align-self,initial);--flex-shrink:0}.e-con-inner>.elementor-widget-spacer>.elementor-widget-container,.e-con>.elementor-widget-spacer>.elementor-widget-container{height:100%;width:100%}.e-con-inner>.elementor-widget-spacer>.elementor-widget-container>.elementor-spacer,.e-con>.elementor-widget-spacer>.elementor-widget-container>.elementor-spacer{height:100%}.e-con-inner>.elementor-widget-spacer>.elementor-widget-container>.elementor-spacer>.elementor-spacer-inner,.e-con>.elementor-widget-spacer>.elementor-widget-container>.elementor-spacer>.elementor-spacer-inner{height:var(--container-widget-height,var(--spacer-size))}.e-con-inner>.elementor-widget-spacer.elementor-widget-empty,.e-con>.elementor-widget-spacer.elementor-widget-empty{position:relative;min-height:22px;min-width:22px}.e-con-inner>.elementor-widget-spacer.elementor-widget-empty .elementor-widget-empty-icon,.e-con>.elementor-widget-spacer.elementor-widget-empty .elementor-widget-empty-icon{position:absolute;top:0;bottom:0;left:0;right:0;margin:auto;padding:0;width:22px;height:22px}<\/style>\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>High-redshift Quasars and Hot DOGs Research Projects A MUSE view of high-redshift radio-loud quasars A MUSE view of high-redshift radio-loud quasars &times; In this project, we focus on a sample of radio-loud quasars at z &gt; 3.5 with deep VLT\/MUSE data. We study the properties of their circumgalactic medium and closest environments, by inspecting for &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"https:\/\/astronomia.udp.cl\/en\/research\/areas\/quasars-and-hot-dogs\/\"> <span class=\"screen-reader-text\">Quasars and Hot DOGs<\/span> Read More &raquo;<\/a><\/p>\n","protected":false},"author":4,"featured_media":0,"parent":737,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"site-sidebar-layout":"no-sidebar","site-content-layout":"page-builder","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"disabled","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":""},"acf":[],"_links":{"self":[{"href":"https:\/\/astronomia.udp.cl\/en\/wp-json\/wp\/v2\/pages\/6783"}],"collection":[{"href":"https:\/\/astronomia.udp.cl\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/astronomia.udp.cl\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/astronomia.udp.cl\/en\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/astronomia.udp.cl\/en\/wp-json\/wp\/v2\/comments?post=6783"}],"version-history":[{"count":13,"href":"https:\/\/astronomia.udp.cl\/en\/wp-json\/wp\/v2\/pages\/6783\/revisions"}],"predecessor-version":[{"id":7958,"href":"https:\/\/astronomia.udp.cl\/en\/wp-json\/wp\/v2\/pages\/6783\/revisions\/7958"}],"up":[{"embeddable":true,"href":"https:\/\/astronomia.udp.cl\/en\/wp-json\/wp\/v2\/pages\/737"}],"wp:attachment":[{"href":"https:\/\/astronomia.udp.cl\/en\/wp-json\/wp\/v2\/media?parent=6783"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}