Self-gravitating Eccentric Discs around Black Holes

Details Self-gravitating Eccentric Discs around Black Holes Self-gravitating Eccentric Discs around Black Holes

Apr 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aspc..160..307s&link_type=abstract

Astrophysical Discs - An EC Summer School, Astronomical Society of the Pacific, Conference series Vol #160, Edited by J. A. Sell

Astronomy and Astrophysics

Astrophysics

9

Scientific paper

We consider self-gravitating stellar discs around supermassive black holes in galactic nuclei. The double nuclei observed in some galaxies, such as M31 and NGC4486B, could consist of an eccentric disc of stars orbiting the central black hole. Employing averaging techniques appropriate to dynamics within the radius of influence of the black hole, we derive equations governing the structure of a cold, eccentric disc that precesses steadily. Noting the connection with the Laplace-Lagrange discs of planetary dynamics, we formulate an eigenvalue problem, and present some numerical solutions. We briefly discuss dynamical friction.

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