Evolution of growing black holes in axisymmetric galaxy cores

Details Evolution of growing black holes in axisymmetric galaxy cores Evolution of growing black holes in axisymmetric galaxy cores

2011-08-19

arxiv.org/abs/1108.3993v1

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

15 pages, 7 figures,accepted by MNRAS

Scientific paper

NBody realizations of axisymmetric collisional galaxy cores (e.g. M32, M33, NGC205, Milky Way) with embedded growing black holes are presented. Stars which approach the disruption sphere are disrupted and accreted to the black hole. We measure the zone of influence of the black hole and disruption rates in relaxation time scales. We show that secular gravitational instabilities dominate the initial core dynamics, while the black hole is small and growing due to consumption of stars. Later, the black hole potential dominates the core, and loss cone theory can be applied. Our simulations show that central rotation in galaxies can not be neglected for relaxed systems, and compare and discuss our results with the standard theory of spherically symmetric systems.

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