Galactic mergers with supermassive black holes

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Title: Galactic mergers with supermassive black holes
Author: Merritt, David; Cruz, Fidel
Abstract: We present the results of N-body simulations of the accretion of high-density dwarf galaxies by low-density giant galaxies. Both galaxies contain power-law central density cusps and point masses representing supermassive black holes; the ratio of galaxy masses is 3 : 1. The cusp of the dwarf galaxy is always disrupted during the merger, leading to a remnant with a weak power law in the intrinsic density and a “core”in the projected density. Removing both black holes from the giant and dwarf galaxies allows the dwarf galaxy to remain intact and leads to a remnant with a high central density, contrary to what is observed. Our results support the hypothesis than the persistence of low-density cores in giant galaxies following mergers is a consequence of the existence of supermassive central black holes.
Description: Also archived in: arXiv:astro-ph/0106358 v1 20 Jun 2001 AND Rutgers Astrophysics Preprint Series No. 319"The Central kiloparsec of Starbursts and AGN: The La Palma Connection". Proceedings of the Astronomical Society of the Pacific Conference Series. Held at Hotel Hacienda San Jorge, Los Cancajos, La Palma, Spain: 7-11 May 2001.
Record URI: http://hdl.handle.net/1850/1485
Date: 2001-01

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