Dark matter halo cores in hierarchical clustering theories.

Details Dark matter halo cores in hierarchical clustering theories. Dark matter halo cores in hierarchical clustering theories.

Dec 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999prama..53.1001s&link_type=abstract

Pramāna, Vol. 53, No. 6, p. 1001 - 1011

Physics

Dark Matter

Scientific paper

In hierarchical clustering theories, smaller masses generally collapse earlier than larger masses and so are denser on the average. The core of a small mass halo could be dense enough to resist disruption and survive undigested, when it gets incorporated into a bigger object, and determine the halo structure in the inner regions. The author examines the possible consequences of this idea in determining the structure of dark halo cores, by considering, both simple scaling arguments, and a novel fluid approach to self-similar collapse solutions for the dark matter phase space density.

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