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9.14. A simple mass estimate for central black holes in cuspy galaxies

Published online by Cambridge University Press:  25 May 2016

S. de Rijcke ,
V. de Bruyne ,
H. Dejonghe  and
A. Mathieu
S. de Rijcke
Affiliation:
Sterrenkundig Observatorium, University of Ghent Krijgslaan 281, S9, B9000 Gent, Belgium
V. de Bruyne
Affiliation:
Sterrenkundig Observatorium, University of Ghent Krijgslaan 281, S9, B9000 Gent, Belgium
H. Dejonghe
Affiliation:
Sterrenkundig Observatorium, University of Ghent Krijgslaan 281, S9, B9000 Gent, Belgium
A. Mathieu
Affiliation:
Sterrenkundig Observatorium, University of Ghent Krijgslaan 281, S9, B9000 Gent, Belgium

Abstract

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We argue that the velocity dispersion of the stars is likely a monotonically decreasing function of radius along the minor axis in the central regions of cuspy galaxies. We show that then a central mass concentration (a black hole) must be present and calculate its minimum mass, M⊙. This lower bound is relevant and entirely consistent with current mass estimates.

Type
Part III. Black Holes and Central Activity
Information
Symposium - International Astronomical Union , Volume 184: The Central Regions of the Galaxy and Galaxies , 1998 , pp. 409 - 410
Copyright
Copyright © Kluwer 1998