Apoastron shift constraints on dark matter distribution at the Galactic Center
نویسندگان
چکیده
منابع مشابه
Evolution 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...
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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...
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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...
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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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We discuss the γ-ray signal to be expected from dark matter (DM) annihilations at the Galactic Center. To describe the DM distribution in the Galactic halo we base on the Jeans equation for self-gravitating, anisotropic equilibria. In solving the Jeans equation, we adopt the specific correlation between the density ρ(r) and the velocity dispersion σr (r) expressed by the powerlaw behavior of th...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2007
ISSN: 1550-7998,1550-2368
DOI: 10.1103/physrevd.76.062001