First Results from the SRG/eROSITA All-Sky Survey: From Stars to Cosmology

Session

AGN Surveys and History of Acceration, Clustering

2

16 Sept 2024, 11:20

HS 1 Hörsaal/lecture hall 1 (Garching)

320. X-ray beacons at late cosmic dawn

Juliem Wolf (MPIA)

16/09/2024, 12:10

Oral

From extrapolations of contemporaneous X-ray active galactic nuclei (AGN) luminosity functions, the eROSITA all-Sky Survey (eRASS) is expected to contain ~100 X-ray ultra-luminous quasars, that emitted their light when the universe was less than a billion years old, at z>5.6. In the luminosity regime probed by eROSITA at these early times, the powerful X-ray output of these quasars is driven...

330. An X-Ray Census of Active Galactic Nuclei in the Virgo and Fornax Clusters of Galaxies with SRG/eROSITA

Meicun Hou (Kavli Institute for Astronomy and Astrophysics, Peking University)

16/09/2024, 12:30

Oral

We present a uniform and sensitive X-ray census of active galactic nuclei (AGNs) in the two nearest galaxy clusters, Virgo and Fornax, utilizing the newly released X-ray source catalogs from the first all-sky scan of Spectrum-Roentgen-Gamma/eROSITA. A total of 50 and 10 X-ray sources are found positionally coincident with the nuclei of member galaxies in Virgo and Fornax, respectively, down to...

314. Simulation-based inference of the AGN population based on the radiation-regulated unification model in the X-rays

Dimitra Gerolymatou (University of Geneva)

16/09/2024, 12:45

Oral

X-ray surveys of AGN provide direct constraints on the properties of individual AGN, such as their accretion, reflection, and obscuration. Previous AGN population synthesis models have not addressed such constraints self-consistently. Here we use a simulation-based inference (SBI) approach to constrain the geometrical and physical properties of the AGN population. We perform numerical...