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2000MNRAS.318..163M - Mon. Not. R. Astron. Soc., 318, 163-172 (2000/October-2)
The Tully-Fisher relation and its implications for the halo density profile and self-interacting dark matter.
MO H.J. and MAO S.
Abstract (from CDS):
The halo profile required by the Tully-Fisher relation is as concentrated as that required by the observed rotation curves of faint discs, but less concentrated than that given by current simulations of cold dark matter (CDM) models. We discuss the implication of such profiles for structure formation in the Universe and for the properties of dark matter. Our results cannot be explained by some of the recent proposals for resolving the conflict between conventional CDM models and the observed rotation-curve shapes of faint galaxies. If dark matter self-interaction (either scattering or annihilation) is responsible for the shallow profile, the observed Tully-Fisher relation requires the interaction cross-section σX to satisfy <]σXverbarvverbar>/mX∼10–16cm3.s–1.GeV–1, where mX is the mass of a dark matter particle.
Abstract Copyright: 2000, Royal Astronomical Society
Journal keyword(s): galaxies: formation - galaxies: spiral - galaxies: structure - cosmology: theory - dark matter
CDS comments: p.170: MS 21137-23 misprint for 1E 2137.3-2353
Simbad objects: 5
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