Dark matter at the end of the Galaxy

Mariangela Lisanti, Louis E. Strigari, Jay G. Wacker, Risa H. Wechsler

Research output: Contribution to journalArticle

102 Scopus citations

Abstract

Dark matter density profiles based upon ΛCDM cosmology motivate an ansatz velocity distribution function with fewer high-velocity particles than the Maxwell-Boltzmann distribution or proposed variants. The high-velocity tail of the distribution is determined by the outer slope of the dark matter halo-the large radius behavior of the Galactic dark matter density. N-body simulations of Galactic halos reproduce the high-velocity behavior of this ansatz. Predictions for direct detection rates are dramatically affected for models where the threshold scattering velocity is within 30% of the escape velocity.

Original languageEnglish (US)
Article number023519
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume83
Issue number2
DOIs
StatePublished - Jan 24 2011

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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