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Dark Matter Caustics

Natarajan, Aravind
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Abstract

The continuous infall of dark matter with low velocity dispersion in galactic halos leads to the formation of high density structures called caustics. Dark matter caustics are of two kinds : outer and inner. Outer caustics are thin spherical shells surrounding galaxies while inner caustics have a more complicated structure that depends on the dark matter angular momentum distribution. The presence of a dark matter caustic in the plane of the galaxy modifies the gas density in its neighborhood which may lead to observable effects. Caustics are also relevant to direct and indirect dark matter searches.

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72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS79 ASTRONOMY AND ASTROPHYSICSANGULAR MOMENTUMBARYONSCOSMOLOGYDENSITYELEMENTARY PARTICLESFERMIONSGALAXIESHADRONSMASSMATTERNONLUMINOUS MATTERPHYSICAL PROPERTIESREST MASSSYMMETRY BREAKING

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Natarajan, Aravind. 2010-08-30. Dark Matter Caustics. https://doi.org/10.1063/1.3489565

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