Black hole and nuclear cluster scaling relations: M bh ~ M nc 2.7+/-0.7
Abstract
There is a growing array of supermassive black hole and nuclear star cluster scaling relations with their host spheroid, including a bent (black hole mass)-(host spheroid mass) M bh-M sph relation and a different (massive compact object mass)-(host spheroid velocity dispersion) M mco-σ relations for black holes and nuclear star clusters. By combining the observed M bh ~ σ5.5 relation with the observed M nc ~ σ1.6-2.7 relation, we derive the expression M bh ~ M nc 2-3.4, which should hold until the nuclear star clusters are eventually destroyed in the larger core-Sérsic spheroids. This new mass scaling relation helps better quantify the rapid evolutionary growth of massive black holes in dense star clusters, and the relation is consistently recovered when coupling the observed M nc ~ M sph 0.6-1.0 relation with the recently observed quadratic relation M bh ~ M sph 2 for Sérsic spheroids.
- Publication:
-
Star Clusters and Black Holes in Galaxies across Cosmic Time
- Pub Date:
- February 2016
- DOI:
- 10.1017/S1743921315008017
- arXiv:
- arXiv:1412.5715
- Bibcode:
- 2016IAUS..312..269G
- Keywords:
-
- galaxies;
- black holes;
- nuclear star clusters;
- Astrophysics - Astrophysics of Galaxies
- E-Print:
- Invited talk. IAU Symposium 312, "Star Clusters and Black Holes in Galaxies across Cosmic Time", eds. F.Liu and R.Spurzem. 5 conference-sized pages