DISTRIBUTION FUNCTION IN THE CENTER OF THE DARK MATTER HALO

DOI10.1142/S0218271809014583zbMATH Open1173.85305arXiv0806.0208OpenAlexW1851559426MaRDI QIDQ3636393

Author name not available (Why is that?)

Publication date: 30 June 2009

Published in: (Search for Journal in Brave)

Abstract: N-body simulations of dark matter halos show that the density profiles of halos behave as

h o (r) p r o p t o r^{- a l p h a (r)}

, where the density logarithmic slope

a l p h a s i m e q 1 s i m 1.5

in the center and

a l p h a s i m e q 3 s i m 4

in the outer parts of halos. However, some observations are not in agreement with simulations in the very central region of halos. The simulations also show that velocity dispersion anisotropy parameter

in the inner part of the halo and the so called "pseudo phase-space density"

h o / s i g m a^{3}

behaves as a power-law in radius

r

. With these results in mind, we study the distribution function and the pseudo phase-space density

h o / s i g m a^{3}

of the center of dark matter halos and find that they are closely-related.

Full work available at URL: https://arxiv.org/abs/0806.0208

zbMATH Keywords

No records found.

Mathematics Subject Classification ID

No records found.

This page was built for publication: DISTRIBUTION FUNCTION IN THE CENTER OF THE DARK MATTER HALO

Report a bug (only for logged in users!)Click here to report a bug for this page (MaRDI item Q3636393)