Dark matter distribution and annihilation at the Galactic center
نویسندگان
چکیده
منابع مشابه
Dark matter spikes and annihilation radiation from the galactic center.
The annihilation rate of weakly interacting cold dark matter particles at the galactic center could be greatly enhanced by the growth of a density spike around the central supermassive black hole (SBH). Here we discuss the effects of hierarchical mergers on the central spike. Mergers between halos containing SBHs lead to the formation of SBH binaries which transfer energy to the dark matter par...
متن کاملEvolution of the dark matter distribution at the galactic center.
Annihilation radiation from neutralino dark matter at the Galactic center (GC) would be greatly enhanced if the dark matter were strongly clustered around the supermassive black hole (SBH). The existence of a dark matter "spike" is made plausible by the observed, steeply rising stellar density near the GC SBH. Here the time-dependent equations describing gravitational interaction of the dark ma...
متن کاملDark Matter at the Galactic Center
This is a summary of a paper of ours, ref. [1], in which we use the absence of neutrino signals from the galactic center to bound the steepness of a possible central cusp in a dark matter halo made of neutralinos. This summary updates the bounds published in [1] by using the current upper limit by the MACRO collaboration [2] on the neutrino emission from the galactic center. The evidence is mou...
متن کاملDark-matter spike at the galactic center?
The past growth of the central black hole ~BH! might have enhanced the density of cold dark matter halo particles at the galactic center. We compute this effect in realistic growth models of the present (223) 310M ( BH from a low-mass seed BH, with special attention to dynamical modeling in a realistic galaxy environment with merger and orbital decay of a seed BH formed generally outside the ex...
متن کاملRelativistic dark matter at the galactic center
In a large region of the supersymmetry parameter space, the annihilation cross section for neutralino dark matter is strongly dependent on the relative velocity of the incoming particles. We explore the consequences of this velocity dependence in the context of indirect detection of dark matter from the galactic center. We find that the increase in the annihilation cross section at high velocit...
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ژورنال
عنوان ژورنال: Journal of Physics: Conference Series
سال: 2016
ISSN: 1742-6588,1742-6596
DOI: 10.1088/1742-6596/675/1/012004