The origin of the compact radio/mm emission observed in the vast majority of Active Galactic Nuclei (AGN) is still largely debated. Over the past few years it has been proposed that the main mechanism responsible for this component is synchrotron emission from the accretion disk corona, which is expected to produce also the X-ray emission ubiquitously observed in AGN.
In this project we exploit two recently accepted ALMA programs and four accepted programs with X-ray satellites, to study the relation between X-ray and mm emission in radio-quiet AGN. With the projects here we plan, for the first time in a systematic way, to use ALMA to shed light on the origin of nuclear radio emission in radio-quiet AGN. This will be done through a volume-limited survey of 27 hard X-ray detected AGN and a mm/X-ray variability study of the brightest unobscured AGN in the southern sky, IC 4329A. The latter project combines 10 highest-resolution ALMA observations with 45 simultaneous and quasi-simultaneous Swift, XMM-Newton, NuSTAR and NICER observations.
Type of project: Research – actively recruiting new young researchers
Status: Ongoing
Researchers: Claudio Ricci, Elena Shablovinskaya
Funding source: Gemini-ANID