Dark Matter Scaling Relations

Details Dark Matter Scaling Relations Dark Matter Scaling Relations

2000-04-28

arxiv.org/abs/astro-ph/0004397v1

Astrophys.J.537:L9-L12,2000

Astronomy and Astrophysics

Astrophysics

4 pages, 4 figures, Accepted for Publication in Apj Lett

Scientific paper

10.1086/312747

We establish the presence of a dark matter core radius, for the first time in a very large number of spiral galaxies of all luminosities. Contrary to common opinion we find that the sizes of these cores and the " DM core problem" are bigger for more massive spirals. As a result the Burkert profile provides an excellent mass model for dark halos around disk galaxies. Moreover, we find that the spiral dark matter core densities $\rho_{0}$ and core radii $r_{0}$ lie in the same scaling relation $\rho_{0}=4.5\times 10^-2 (r_{0}/kpc)^{-2/3} M_{\odot}pc^{-3}$ of dwarf galaxies with core radii upto ten times more smaller.

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