Massive stars have a significant impact on the dynamical evolution of star clusters. They play a crucial role during star formation, as their radiation can push surrounding gas away and inhibit further star formation. Additionally, strong mass loss from massive stars via strong winds can rapidly reduce the gravitational potential of star clusters and trigger their fast expansion. Once these massive stars evolve into black holes, they continue to drive the expansion of the cluster by forming binary black holes at the center. In this talk, we will discuss the impact of stochastic variations in star formation and the variation of initial mass function on the dissolution of star clusters. We will utilize numerical N-body simulations to explore the potential of combining these models with observations, such as Gaia and CSST data, to constrain the initial conditions of star clusters. Specifically, we will focus on investigating the dynamical effects of massive stars and black holes and their implications for the properties of initial mass functions.
BIO
Long Wang obtained a Ph.D. in astrophysics from Peking University in 2016 under the supervision of Professors Rainer Spurzem and M.B.N. Kouwenhoven. The focus of the research was on the long-term evolution of globular clusters. Subsequently, Long Wang secured the RIKEN postdoctoral fellowship and collaborated with Professor Junichiro Makino at the RIKEN Center for Computational Science from 2016 to 2017. The research during this period involved the development of high-performance N-body codes for modeling planetary rings and massive star clusters. Following this, Long Wang held a Humboldt postdoctoral fellowship at the University of Bonn from 2017 to 2019, working closely with Professor Pavel Kroupa. The research during this time delved into the impact of stellar dynamics on star formation and the evolution of star clusters. Subsequently, from 2019 to 2021, Long Wang was a JSPS fellow at the University of Tokyo, collaborating with Professors Michiko Fujii and Ataru Tanikawa on the formation of gravitational wave sources in dense star clusters. Since 2021, Long Wang has been serving as an associate professor at Sun Yat-sen University. Long Wang's research interests encompass high-performance code development and N-body stellar dynamics studies, focusing on topics such as the formation and evolution of star clusters and tidal streams, IMBH/SMBH formation, gravitational waves, high-performance computing, and N-body algorithm development.
Host: Hui Li
