Data: 17.03.2023

Palestrante: Dr. Niel Brandt (The Pennsylvania State University)

Link: https://youtube.com/live/1-WJgn6Ax90

Resumo:

The 7 Ms Chandra X-ray Observatory exposure on the Chandra Deep Field-South (CDF-S) has provided the most sensitive extragalactic X-ray survey by a wide margin. About 1050 X-ray sources have been detected, primarily distant active galactic nuclei (AGNs) and starburst/normal galaxies. The unmatched deep multiwavelength coverage for these sources allows superb follow-up investigations, revealing the details of supermassive black-hole growth over most of cosmic time. I will briefly describe the sources in the 7 Ms CDF-S and highlight some exciting science results. The latter will include (1) measurements of long-term black-hole growth informed by galaxy morphological and physical measurements; (2) constraints upon black-hole growth in the first galaxies as revealed by direct detection and stacking; and (3) the discovery of representatives of a new population of faint, fast X-ray transient sources. Finally, I will discuss some future prospects for X-ray surveys of AGNs in the distant universe, including the recently completed 5 Ms XMM-SERVS survey of the LSST Deep Drilling Fields and new X-ray missions.