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.

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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. This work was supported by NSF grant AST 00-71099, NASA grants NAG5- 6037 and NAG5-9046, by a fellowship from the Consejo Nacional de Ciencia y Tecnologia de Mexico, and by grant no. MCA00N010N from NCSA. ISBN: 1583810897Note: imported from RIT’s Digital Media Library running on DSpace to RIT Scholar Works in February 2014.

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Conference Proceeding

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School of Physics and Astronomy (COS)


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