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Stellar Mergers in Dense Stellar Systems and growth of supermassive black holes

Published online by Cambridge University Press:  13 February 2024

Long Wang Open the ORCID record for Long Wang [Opens in a new window]
Long Wang*
Affiliation:
School of Physics and Astronomy, Sun Yat-sen University, Daxue Road, Zhuhai, 519082, China CSST Science Center for the Guangdong-Hong Kong-Macau Greater Bay Area, Zhuhai, 519082, China
*
email: wanglong8@sysu.edu.cn
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Abstract

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The rapid formation of supermassive black holes (SMBHs) at high redshifts is still a puzzle. One hypothesis is that intermediate-mass black holes (IMBHs) serve as seeds for their formation, which could arise from hierarchical mergers in dense star clusters. There are two possible pathways for IMBH formation: 1) very massive stars may form in young star clusters, such as Pop3 clusters, and evolve into IMBHs within a few million years; 2) multiple stellar-mass black holes can merge into IMBHs in dense nuclear star clusters. Detailed insights into these scenarios can be obtained through high-resolution star-by-star simulations of dense star clusters. Furthermore, upcoming observations of faint quasars, nuclear star clusters, and Pop3 stars with the James Webb Space Telescope (JWST) will offer valuable data to constrain theoretical models and deepen our understanding of the rapid formation of SMBHs.

Keywords

nuclear star clusterssupermassive black holesintermediate-mass black holesgravitational wavesnumerical simulations
Type
Contributed Paper
Information
Proceedings of the International Astronomical Union , Volume 18 , Symposium S377: Early Disk-Galaxy Formation from JWST to the Milky Way , December 2022 , pp. 34 - 38
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Copyright
© The Author(s), 2024. Published by Cambridge University Press on behalf of International Astronomical Union

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