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A 20,000 [ITAL]M[/ITAL][TINF]⊙[/TINF] Black Hole in the Stellar Cluster G1

Karl GebhardtDepartment of Astronomy, University of Texas at Austin, RLM 15.308, 26th and Speedway, Austin, TX 78712R. M. RichUCLA, Department of Physics and Astronomy, Math-Sciences 8979, Los Angeles, CA 90095-1562Luis C. HoCarnegie Observatories, 813 Santa Barbara Street, Pasadena, CA 91101-1292

2002en

ABI

Annotatsiya

We present the detection of a 2.0(+1.4,-0.8)x10^4 solar mass black hole (BH) in the stellar cluster G1 (Mayall II), based on data taken with the Space Telescope Imaging Spectrograph onboard the Hubble Space Telescope. G1 is one of the most massive stellar clusters in M31. The central velocity dispersion (25 kms) and the measured BH mass of G1 places it on a linear extrapolation of the correlation between BH mass and bulge velocity dispersion established for nearby galaxies. The detection of a BH in this low-mass stellar system suggests that (1) the most likely candidates for seed massive BHs come from stellar clusters, (2) there is a direct link between massive stellar clusters and normal galaxies, and (3) the formation process of both bulges and massive clusters is similar due to their concordance in the M_BH/sigma relation. Globular clusters in our Galaxy should be searched for central BHs.

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Identifikatorlar

DOI: 10.1086/342980

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