Colloquium on Dec. 5th, 2018: Review to the stellar-mass black hole spin measurement

Speaker:苟利军（国家天文台）/ Lijun Gou(NAOC)

Venue:Gewu 4410

Time:3:00 PM, Wednesday, 5th December, 2018

Abstract:

Black holes are the simplest celestial bodies in the universe. Astronomical black holes only need two physical quantities (mass and spin) for a complete description. Since the first black hole candidate Cygnus X1 was detected in the 1960s, so far, the mass of more than 20 black hole systems has been dynamically measured. Compared with the mass, the research on black hole spin is much more important and popular because it is the energy source of many theoretical models. In this talk, I will firstly give a brief review to the spin measurement methods including their foundation. Afterwards, I will focus on the application to the systems as well well the latest measurement.

Personal Information:

Dr. Lijun Gou is a research professor at the National Astronomical Observatories of the Chinese Academy of Sciences (NAOC) since 2012, and the adjunct professor of astronomy at the University of Chinese Academy of Sciences, deputy director of the Beijing Astronomical Society. He received his undergraduate and master's degrees in astronomy from Nanjing University, China, he got his Ph.D. from Pennsylvania State University, USA, and later served as a postdoctoral fellow and researcher at the Harvard-Smithsonian Center for Astrophysics at Harvard University, USA. In 2012, he was selected into the Youth Thousand Talents Program of China. His research interests focus on the high-energy astrophysics, including black holes, as well as their related phenomena. Dr. Gou has published over 30 journal papers with a citation over 1800 times, and H-index is 21. Meanwhile, Dr. Gou has translated several popular science books and finished nearly 20 popular science articles.