Title: Black Holes seen in the Gamma-ray Sky

Speaker：Jian Li

Abstract:

Gamma-ray astronomy serves as a unique window into the most extreme phenomena in our universe, providing critical insights into high-energy particle acceleration mechanisms. Among astrophysical objects, black holes (BHs) constitute the most populated class of gamma-ray sources, serving as potential keys to resolving several longstanding astrophysical puzzles - including the origin of cosmic rays, the nature of galactic/extragalactic diffuse gamma-ray backgrounds, and astrophysical neutrino origins. Beyond their relativistic jets, contemporary models suggest multiple particle acceleration mechanisms operating in BH environments, which could generate detectable gamma-ray emissions. In this presentation, I will discuss our recent investigations of BH-related gamma-ray phenomena with LHAASO and Fermi-LAT observations.

Bio:

Prof. Jian Li, a faculty member at the University of Science and Technology of China. He has established long-term research programs in high-energy astrophysics and gamma-ray astronomy. As of March 2025, he has published over 100 SCI-indexed papers (including 18 as first/corresponding author), notably featuring 2 Nature Astronomy articles (1 as first/sole corresponding author, 1 as co-corresponding author), with total citations exceeding 8,000 per NASA/ADS statistics.

As Principal Investigator, he has led multi-wavelength observational campaigns utilizing:
Space-based platforms: XMM-Newton, Chandra, NuSTAR, INTEGRAL, Swift, HXMT
Ground facilities: GMRT, IRAM 30m radio telescope, FAST 500m radio telescope, Delingha 13.7m radio telescope, Lijiang 2.4m optical telescope.