University of Surrey

Test tubes in the lab Research in the ATI Dance Research

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
Authors :
NameEmailORCID
Zocchi, AUNSPECIFIEDUNSPECIFIED
Gieles, Mm.gieles@surrey.ac.ukUNSPECIFIED
Hénault-Brunet, VUNSPECIFIEDUNSPECIFIED
Date : 21 January 2015
Uncontrolled Keywords : astro-ph.GA, astro-ph.GA
Related URLs :
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 13:33
Last Modified : 17 May 2017 15:11
URI: http://epubs.surrey.ac.uk/id/eprint/839641

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year


Information about this web site

© The University of Surrey, Guildford, Surrey, GU2 7XH, United Kingdom.
+44 (0)1483 300800