Tracing the growth of black holes and galaxies

Speaker: Dr. Hyewon Suh (Subaru Telescope)

Date: 2019/09/03, Tuesday, 5 pm

Room: Science hall B102

Language: English

Abstract:

The growth of black holes appears to be closely connected with galaxy evolution, and yet how nuclear activity affects the growth of their host galaxies remains unclear. The growth of SMBHs and the star formation history show a remarkably similar evolutionary trend through cosmic time, where the peaks of most violent phase of luminous objects occur at z~1-3 with a dramatic decline toward low redshift, and much more moderate activity at later cosmic times. To examine the link between nuclear activity and star formation in galaxies, we investigate the multi-wavelength properties of host galaxies of ~4000 X-ray selected AGNs out to z~3 in the Chandra-COSMOS Legacy Survey. In this talk, I will present the influence of AGN on the growth of galaxies by examining the possible connection between AGN activity and star formation in galaxies. I will discuss the evolution of the black hole-to-host galaxy relations at a critical epoch of growth at “Cosmic Noon” (z~1-3), when supermassive black hole (SMBH) growth is at its peak. I will also talk about the first accreting black hole candidates at “Cosmic Dawn” (z>7) to provide the crucial evidence for the growth of SMBHs and galaxy evolution at early cosmic epoch.