Thumbnail
Access Restriction
Open

Author White, Simon D. M. ♦ Vogelsberger, Mark
Source arXiv.org
Content type Text
File Format PDF
Date of Submission 2008-09-02
Language English
Subject Domain (in DDC) Computer science, information & general works ♦ Natural sciences & mathematics ♦ Astronomy & allied sciences ♦ Physics
Subject Keyword Astrophysics ♦ physics:astro-ph
Abstract Caustics are a generic feature of the nonlinear growth of structure in the dark matter distribution. If the dark matter were absolutely cold, its mass density would diverge at caustics, and the integrated annihilation probability would also diverge for individual particles participating in them. For realistic dark matter candidates, this behaviour is regularised by small but non-zero initial thermal velocities. We present a mathematical treatment of evolution from Hot, Warm or Cold Dark Matter initial conditions which can be directly implemented in cosmological N-body codes. It allows the identification of caustics and the estimation of their annihilation radiation in fully general simulations of structure formation.
Description Comment: 6 pages, 1 figure, Accepted for publication in MNRAS, minor edits
Educational Use Research
Learning Resource Type Article
Page Count 6


Open content in new tab

   Open content in new tab