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Dynamics of Intermediate Mass Black Holes in Star Clusters | | Holger Baumgardt
; Simon Portegies Zwart
; Steve McMillan
; Jun Makino
; Toshikazu Ebisuzaki
; | | Date: |
5 Mar 2004 | | Subject: | astro-ph | | Affiliation: | RIKEN), Simon Portegies Zwart (Amsterdam), Steve McMillan (Drexel), Jun Makino (Univ. of Tokyo), Toshikazu Ebisuzaki (RIKEN | | Abstract: | We have followed the evolution of multi-mass star clusters containing massive central black holes by N-body simulations on the GRAPE6 computers of Tokyo University. We find a strong cluster expansion and significant structural changes of the clusters. Star clusters with IMBHs have power-law density profiles $rho ~ r^{-alpha}$ with slopes $alpha=1.55$ inside the influence sphere of the central black hole. This leads to a constant density profile of bright stars in projection, which rules out the presence of intermediate mass black holes in core collapse clusters. If the star clusters are surrounded by a tidal field, a central IMBH speeds up the destruction of the cluster until a remnant of a few hundred stars remains, which stays bound to the IMBH for a long time. We also discuss the efficiency of different detection mechanisms for finding IMBHs in star clusters. | | Source: | arXiv, astro-ph/0403140 | | Services: | Forum | Review | PDF | Favorites | |
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