Mathematics – Logic
Scientific paper
May 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...210.0808h&link_type=abstract
American Astronomical Society Meeting 210, #08.08; Bulletin of the American Astronomical Society, Vol. 39, p.104
Mathematics
Logic
Scientific paper
Mergers of galaxies of similar masses are frequently postulated as a means of transforming gas rich spiral galaxies into red and dead elliptical galaxies and of fueling both starbursts and luminous AGN. Therefore, it is important to develop observational tests of merger-driven galaxy evolution scenarios. Studying the environments of mergers may provide such tests. Towards this end, I have been examining the environments of major mergers between dark matter halos in the millennium simulation, a large, 500 h-1 Mpc box, N-body simulation in which galaxy mass dark matter halos are resolved (Springel et al. 2005). I will present the results of this work, including an analysis of the dependence of the isolated halo merger rate on local overdensity and of the subhalo merger rate on parent halo mass and maximum circular velocity. The results of this study may also prove useful for testing the correspondence between dark matter halo mergers and galaxy mergers and for constraining the relative timescales of halo and galaxy mergers and may serve as a consistency check for the current cosmological paradigm.
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