Dynamics of Dark-Matter Cusps

  • David Merritt
  • Miloš Milosavljević

Abstract

Formation and disruption of dark-matter cusps are reviewed. Accumulation of baryons at the center of a halo can displace the dark matter, converting singular density cusps into low-density cores. The displaced mass can be of order ~ 10M with M the mass of the infailing population. If M is identified with the masses of the black holes currently observed at the centers of bright galaxies, predicted core radii are ~ a few х 102 pc. Other mechanisms, such as early mass outflow, may explain the large dark-matter cores in dwarf and low-surface-brightness galaxies. Predictions of dark matter annihilation radiation from the center of the Milky Way galaxy are shown to be strongly dependent on the galaxy’s merger history.

Keywords

Torque Stratification Milo 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2002

Authors and Affiliations

  • David Merritt
    • 1
  • Miloš Milosavljević
    • 1
  1. 1.Rutgers UniversityNew BrunswickUSA

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