Structure and adiabatic compression of dark matter halos: Simple analytic model
نویسندگان
چکیده
منابع مشابه
Semi-Analytic Models for Dark Matter Halos
Various analytic expressions have been proposed for the density profile of dark matter halos. We consider six of these expressions for which the density profile has a power-law fall-off ρ ∝ r−3 at large radii and a power-law cusp ρ ∝ r−γ (γ = 0, 1 2 , 1, 3 2) at small radii. The phase-space distribution function for these models is calculated assuming spherical symmetry and either an isotropic ...
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We study how the internal structure of dark halos is affected if cold dark matter particles are assumed to have a large cross section for elastic collisions. We identify a cluster halo in a large cosmological N-body simulation and resimulate its formation with progressively increasing resolution. We compare the structure found in the two cases in which dark matter is treated as collisionless or...
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The cooling of gas in the centers of dark matter halos is expected to lead to a more concentrated dark matter distribution. The response of dark matter to the condensation of baryons is usually calculated using the model of adiabatic contraction, which assumes spherical symmetry and circular orbits. In contrast, halos in the hierarchical structure formation scenarios grow via multiple violent m...
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ژورنال
عنوان ژورنال: JETP Letters
سال: 2006
ISSN: 0021-3640,1090-6487
DOI: 10.1134/s0021364006140013