A theoretical astrophysicist and currently working at Kavli Institute for Astronomy and Astrophysics (KIAA) in Peking University as a faculty member. My research interests include the physics on the formation and growth of black holes, early universe and gravitational wave astronomy.
Conferences in 2019:
First stars & galaxies, Nagoya, Japan, Nov
3rd Asia-Pacific Conference on Plasma Physics (AAPPS-DPP2019), Hefei, China, Nov
Cosmic Evolution of Quasars from the First Light to Local Relics, Beijing, China, Oct
YKISS 2019: Black Holes and Neutron Stars with Gravitational Waves, Kyoto, Japan, Oct
From AGN to Starburst: A Multi-wavelength Synergy, Guiyang, China, Aug
INTO THE STARLIGHT: The End of the Cosmic Dark Ages, Aspen, USA, Mar
The 3rd Workshop on Gravity and Cosmology, Kyoto, Japan, Feb (lecture)
International KEK-Cosmo and APCosPA Winter School, Tsukuba, Japan, Jan (lecture)
Colloquia/Seminars in 2019:
University of Science and Technology of China
Sun Yat-Sen University
National Astronomical Observatory of Japan (NAOJ)
National Astronomical Observatory of China (NAOC)
Shanghai Astronomical Observatory (SHAO)
Supermassive Black Hole Formation/Growth
Supermassive black holes (SMBHs) are extremely huge objects, which exist at the center of most galaxies in the present universe and even in the early universe. I explore the origin of such mysterious objects and the evolution over the cosmic age. To do so, my research has focused on BH growth via gas accretion and formation of massive BH seeds in protogalaxies.
Black Hole Accretion Physics
As a BH is fed with gas, a large amount of energy release associated with the BH feeding affects star formation on galactic scales and pre- vents gas supply onto the BH itself. The feedback process and self-regulating nature of BH growth lead to open questions regarding (1) the coevolution of SMBHs with their host galaxies and (2) SMBH formation – how are monster BHs produced in the early universe?
The direct detections of GWs by Advanced LIGO have opened a new era in astronomy. The discovery of an unexpected population of massive binary BHs (BBHs) surprised us. I study the BBH formation channels through star formation in the early universe. The first massive binaries in the universe (Pop III) can provide merging BBHs with ~30+30 Msun, which is consistent with LIGO observations. Moreover, such high-z and high mass BBH population create a strong GW background observable by LIGO/Virgo in the near future.