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Evolution of a globular cluster with a two-component BH mass spectrum

Published online by Cambridge University Press:  07 March 2016

Dawoo Park ,
Chunglee Kim ,
Hyung Mok Lee  and
Yeong-Bok Bae
Dawoo Park
Affiliation:
Astronomy Program, Department of Physics and Astronomy, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-742, Korea. email: dawoo@astro.snu.ac.kr
Chunglee Kim
Affiliation:
Astronomy Program, Department of Physics and Astronomy, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-742, Korea. email: dawoo@astro.snu.ac.kr
Hyung Mok Lee
Affiliation:
Astronomy Program, Department of Physics and Astronomy, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-742, Korea. email: dawoo@astro.snu.ac.kr Centre for Theoretical Physics, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-742, Korea
Yeong-Bok Bae
Affiliation:
Astronomy Program, Department of Physics and Astronomy, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-742, Korea. email: dawoo@astro.snu.ac.kr
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Abstract

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Globular clusters (GCs) is dominated by behaviors of high-mass components such as neutron stars (NSs) and black holes (BHs). In this work, we perform direct N-body simulations of a GC assuming two BH masses. We used the BH masses of 10 and 20 M⊙ with total math ratio between those two populations is assumed to be 2:1 and 5:1. Our results show that the heavier BHs (20 M⊙) are depleted in the early stage of cluster evolution. The existence of heavier BH components increase the retention rate of lighter BHs during the cluster evolution. About 30% of ejected BHs are in binaries.

Keywords

Globular ClustersBlack HolesGravitational wave
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 10 , Issue S312: Star Clusters and Black Holes in Galaxies across Cosmic Time , August 2014 , pp. 245 - 246
Copyright
Copyright © International Astronomical Union 2016 

References

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