On the uniqueness of kinematical signatures of intermediate-mass black holes in globular clusters
Zocchi, A, Gieles, M and Hénault-Brunet, V (2015) On the uniqueness of kinematical signatures of intermediate-mass black holes in globular clusters
Full text not available from this repository.Abstract
Finding an intermediate-mass black hole (IMBH) in a globular cluster (GC), or proving its absence, is a crucial ingredient in our understanding of galaxy formation and evolution. The challenge is to identify a unique signature of an IMBH that cannot be accounted for by other processes. Observational claims of IMBH detection are often based on analyses of the kinematics of stars, such as a rise in the velocity dispersion profile towards the centre. In this contribution we discuss the degeneracy between this IMBH signal and pressure anisotropy in the GC. We show that that by considering anisotropic models it is possible to partially explain the innermost shape of the projected velocity dispersion profile, even though models that do not account for an IMBH do not exhibit a cusp in the centre.
Item Type: | Article | ||||||||||||
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Divisions : | Faculty of Engineering and Physical Sciences > Physics | ||||||||||||
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Date : | 21 January 2015 | ||||||||||||
Uncontrolled Keywords : | astro-ph.GA, astro-ph.GA | ||||||||||||
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Depositing User : | Symplectic Elements | ||||||||||||
Date Deposited : | 17 May 2017 13:33 | ||||||||||||
Last Modified : | 19 Dec 2019 00:17 | ||||||||||||
URI: | http://epubs.surrey.ac.uk/id/eprint/839641 |
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