Preservation of Cuspy Profiles in Disk Galaxy Mergers

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We carried out three self-consistent $N$-body simulations of galaxy mergers, with a cuspy dark matter profile, in order to study if the inner dark density slope is preserved in the remnants. In these simulations the progenitors include both a stellar disk and an intrinsic angular momentum for the halos, unlike previous similar studies. The mass-ratios of progenitor galaxies are about 1:1, 1:3 and 1:10. We find that the initial cuspy density profile of the dark halos is preserved in the remnants for the cases considered here.
7 pages, 4 figures. Accepted version in RevMexAA

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Astrophysics

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http://salesiana.dossiersoluciones.com/handle/123456789/100308

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/astro-ph/0506290
 http://arxiv.org/abs/astro-ph/0506290

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arXiv