منابع مشابه
Gamma-Ray Excess and the Minimal Dark Matter Model
The nature of the dark matter (DM) in the Universe is one of the most fascinating mysteries of modern cosmology. Unfortunately, we know little about the properties of the dark matter apart from having a very good measurement of the relic density today, ΩDMh 2 = 0.1199± 0.0022 [1]. Thanks to the efforts of the experimental community we also have several bounds from direct and indirect detection ...
متن کاملGamma-ray Signatures of Dark Matter Particles
Indirect detection methods of dark matter particles are discussed. In particular, detection of supersymmetric dark matter through annihilation into gamma-rays is described. Aspects of the density structure of dark matter halos, important for estimating the chances of detection, are discussed. A new class of dark matter candidates, related to non-vanishing neutrinos masses and seemingly only det...
متن کاملGamma Ray Astronomy and Baryonic Dark Matter
Recently, Dixon et al. (1998) have re-analyzed the EGRET data, finding a statistically significant diffuse γ-ray emission from the galactic halo. We show that this emission can naturally be explained within a previously-proposed model for baryonic dark matter, in which γ-rays are produced through the interaction of high-energy cosmic-ray protons with cold H2 clouds clumped into dark clusters th...
متن کاملGamma ray constraints on Decaying Dark Matter
We derive new bounds on decaying Dark Matter from the gamma ray measurements of (i) the isotropic residual (extragalactic) background by Fermi and (ii) the Fornax galaxy cluster by H.E.S.S.. We find that those from (i) are among the most stringent constraints currently available, for a large range of DM masses and a variety of decay modes, excluding half-lives up to ∼ 1026 to few 1027 seconds. ...
متن کاملRobust Gamma Ray Signature of WIMP Dark Matter
If dark matter consists of weakly interacting massive particles (WIMPs), annihilation of WIMPs in the galactic center may lead to an observable enhancement of high energy gamma ray fluxes. We predict the shape and normalization of the component of the flux due to final state radiation by charged particles produced in WIMP annihilation events. The prediction is made without any assumptions about...
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ژورنال
عنوان ژورنال: Journal of Cosmology and Astroparticle Physics
سال: 2015
ISSN: 1475-7516
DOI: 10.1088/1475-7516/2015/10/026