Dark minihalos with intermediate mass black holes

H S Zhao, J Silk

Research output: Contribution to journalArticlepeer-review

52 Citations (Scopus)

Abstract

We argue that the Milky Way (MW) contains 10(3) - 10(4) intermediate mass black holes (IMBHs) of mass 10(2-3)M(circle dot). Some IMBHs are naked, and some are enshrouded by dense dark minispikes and by minihalos of (10(6) - 10(7)) M-circle dot. The IMBH is formed off-center by gas accretion in a minihalo. These dense minihalos ( the nearest at about 2 kpc) survive mostly without tidal stripping by the MW, and are largely invisible except that their pointlike neutralino annihilation signals (with bolometric luminosities of 10(3-5)L(circle dot) 50 GeV/m(x) within 0:01 - 0:1 pc of their centers) stand out well above the MW background and are more luminous than outer dwarf satellite galaxies.

Original languageEnglish
Pages (from-to)011301
Number of pages4
JournalPhysical Review Letters
Volume95
Issue number1
DOIs
Publication statusPublished - 1 Jul 2005

Keywords

  • GALACTIC-CENTER
  • POPULATION-III
  • GAMMA-RAYS
  • MATTER
  • HALOS

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