Galactic cannibalism and CDM density profiles

Details Galactic cannibalism and CDM density profiles Galactic cannibalism and CDM density profiles

2004-04-06

arxiv.org/abs/astro-ph/0404127v2

Astronomy and Astrophysics

Astrophysics

6 pages with 3 figures. Version accepted for publication in MNRAS. Longer than first version, with results from additional sim

Scientific paper

10.1111/j.1365-2966.2004.08385.x

Using N-body simulations we show that the process of formation of the brightest cluster galaxy through dissipationless galactic cannibalism can affect the inner cluster dark matter density profile. In particular, we use as realistic test case the dynamical evolution of the galaxy cluster C0337-2522 at redshift z=0.59, hosting in its centre a group of five elliptical galaxies which are likely to be the progenitor of a central giant elliptical. After the formation of the brightest cluster galaxy, the inner cluster dark matter density profile is significantly flatter (logarithmic slope 0.49

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