Growth of intermediate mass black holes in first star clusters
| Autor: | Yuya Sakurai, Naoki Yoshida, Michiko S. Fujii |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Physics
010308 nuclear & particles physics Astrophysics::High Energy Astrophysical Phenomena Dark matter Gas supply Stellar collision Astronomy and Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics Galaxy merger 01 natural sciences Star cluster Space and Planetary Science Stellar dynamics 0103 physical sciences Astrophysics::Solar and Stellar Astrophysics Astrophysics::Earth and Planetary Astrophysics Halo 010303 astronomy & astrophysics Astrophysics::Galaxy Astrophysics |
| Zdroj: | Proceedings of the International Astronomical Union. 14:220-223 |
| ISSN: | 1743-9221 1743-9213 |
| DOI: | 10.1017/s1743921319007245 |
| Popis: | We study runaway stellar collisions in primordial star clusters and formation of intermediate mass black holes (IMBHs). Using cosmological simulations, we identify eight atomic-cooling halos in which the star clusters form. We follow stellar and dark matter (DM) dynamics for 3Myr using hybrid N-body simulations. We find that the runaway stellar collisions occur in all star clusters and IMBHs with masses ∼400–1900M⊙ form. Performing additional N-body simulations, we explore evolutions of the IMBHs in the star clusters for 15 Myr. The IMBH masses grow via stellar tidal disruption events (TDEs) to ∼700–2500 M⊙. The TDE rates are ∼0.3–1.3 Myr−1. DM motions affect the star cluster evolutions and reduce the TDE rates. The IMBHs may subsequently grow to SMBHs by gas supply through galaxy mergers or large-scale gas inflows, or they may remain within or around the clusters. |
| Databáze: | OpenAIRE |
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