Time-dependent models for dark matter at the galactic center

By G. Bertone, D. Merritt. 2005

142 citations recorded by the source corpus.

The prospects for indirect detection of dark matter at the galactic center with {gamma}-ray experiments like the space telescope GLAST, and air Cherenkov telescopes like HESS, CANGAROO, MAGIC and VERITAS depend sensitively on the mass profile within the inner parsec. We calculate the distribution of dark matter on subparsec scales by integrating the time-dependent Fokker-Planck equation, including the effects of self-annihilations, scattering of dark matter particles by stars, and capture in the supermassive black hole. We consider a variety of initial dark matter distributions, including models with very high densities ('spikes') near the black hole, and models with 'adiabatic compression' of the baryons. The annihilation signal after 10{sup 10} yr is found to be substantially reduced from its initial value, but in dark matter models with an initial spike, order-of-magnitude enhancements can persist compared with the rate in spike-free models.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/0e45339c9788ed19494c7990c18cd079c301c2d9

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In Astronomy and Astrophysics

1. M. Fairbairn
2. A. Benson
3. Christoph Weniger

In Nuclear and High Energy Physics

1. M. Fairbairn
2. A. Benson
3. Christoph Weniger

Citations in the corpus

• Baryonic pinching of galactic dark matter halos (2006, background): “We do not attempt to model the complicated dynamics at subparsec scales of the galaxy [41, 42, 43] other than trying to take into account the maximum density due to self-annihilations.”