X-ray surveys have been an effective way to study growing supermassive black holes (SMBHs). Utilizing X-ray survey fields that have extensive multiwavelength data coverage, we can probe how SMBH growth links with the properties of their host galaxies, which will ultimately help to investigate the physical mechanisms behind the potential coevolution of SMBHs and their hosts. In my talk, I will present the relation between SMBH growth and host-galaxy compactness (represented by the central surface-mass density) we found among star-forming galaxies, which is more significant than the relation between SMBH growth and stellar mass or star formation rate. I will also present how the growth of SMBHs varies with Dn4000 (which is closely related to the age of stellar populations). We found that SMBH growth level is typically higher among younger galaxies, but among the oldest/most massive galaxies at low redshift, this trend is not present, which may be associated with additional fueling from hot halo gas and/or enhanced accretion capability.
BIO
Dr. Qingling Ni is currently a postdoctoral researcher at MPE. Her research focuses on the coevolution of supermassive black holes and their host galaxies, multiwavelength studies of AGNs, and X-ray astronomy. She obtained her Ph.D. degree in Astronomy and Astrophysics from Penn State in 2021, and BA from Fudan University in 2016.
Host: Junjie Mao
