On the presence of intermediate black holes in three globular clusters. Issue Volume 14:Issue S351(2019) (May 2019)

• Record Type: Journal Article
• Authors: Baumgardt, Holger; Sollima, Antonio; Hilker, Michael
• Editors: Bragaglia, Angela; Davies, Melvyn; Sills, Alison; Vesperini, Enrico
• Is Part Of: Proceedings of the International Astronomical Union. Volume 14:Issue S351(2019)
• Page Start: 400
• Page End: 403
• Publication Date: 2019-05
• Subjects: globular clusters: general; Astronomy -- Congresses; Astronomy -- Periodicals; 520
• DOI: 10.1017/S1743921319007695
• Languages: English
• ISSNs: 1743-9213

Abstract

Abstract: We investigate whether the globular clusters 47 Tuc, ω Cen and NGC 6624 contain intermediate-mass black holes (IMBHs) by fitting a large grid of N -body simulations against their surface density and velocity dispersion profiles. In our simulations we vary the initial cluster size, the initial mass function and the initial density profile of the clusters as well as the mass fraction of a central intermediate-mass black hole. We find that the surface density and velocity dispersion profiles of all three clusters can be better reproduced by models that do not contain a central IMBH than by any of our IMBH models. If ω Cen and NGC 6624 contain any IMBHs at all, they have to be significantly less massive than suggested in the past.