Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 419, Issue 4, Pages 3560-3570Publisher
OXFORD UNIV PRESS
DOI: 10.1111/j.1365-2966.2011.20000.x
Keywords
galaxies: clusters: general; galaxies: evolution; galaxies: formation; cosmology: theory; dark matter
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Funding
- Nevada NASA
- NASA [NNX10AJ82H, NNX08AE57A]
- NSF [AST-0807491]
- UNLV
- Texas Advanced Computing Center (TACC)
- National Institute for Computational Sciences (NICS)
- Direct For Mathematical & Physical Scien
- Division Of Astronomical Sciences [0807491] Funding Source: National Science Foundation
- NASA [102264, NNX10AJ82H, 130122, NNX08AE57A] Funding Source: Federal RePORTER
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The existence of a bullet cluster (such as 1E 0657-56) poses a challenge to the concordance ? cold dark matter (?CDM) model. Here we investigate the velocity distribution of dark matter (DM) halo pairs in large N-body simulations with differing box sizes (250 h-1 Mpc Gpc) and resolutions. We examine various basic statistics such as the halo masses, pairwise halo velocities (v12), collisional angles and pair separation distances. We then compare our results to the initial conditions required to reproduce the observational properties of 1E 0657-56 in non-cosmological hydrodynamical simulations.
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