Self-gravitating warped disks around nuclear black holes

Details Self-gravitating warped disks around nuclear black holes Self-gravitating warped disks around nuclear black holes

Apr 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007iaus..238..467u&link_type=abstract

Black Holes from Stars to Galaxies -- Across the Range of Masses. Edited by V. Karas and G. Matt. Proceedings of IAU Symposium #

Physics

2

Scientific paper

Many galactic nuclei contain disks of gas and possibly stars surrounding a supermassive black hole. These disks may play a key role in the evolution of galactic centers. Here we address the problem of finding stable warped equilibrium configurations for such disks, considering the attraction by the black hole and the disk self-gravity as the only acting forces. We model these disks as a collection of concentric, circular rings. We find the equilibria of such systems of rings, and determine how they scale with the ring parameters and the mass of the central black hole. We show that in some cases these disk equilibria may be highly warped. We then analyse the stability of these disks, using both direct time integration and linear stability analysis. This shows that the warped disksare stable for a range of disk-to-black hole mass ratios, when the rings extend over a limited range of radii.

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