Proper motion of gamma-rays from microhalo sources

Abstract

I discuss the prospects of detecting the smallest dark matter bound structures present in the Milky Way by searching for the proper motion of $\gamma$-ray sources in the upcoming GLAST all sky map. I show that for dark matter particle candidates that couple to photons the detection of at least one $\gamma$-ray microhalo source with proper motion places a constraint on the couplings and mass of the dark matter particle. For SUSY dark matter, proper motion detection implies that the mass of the particle is less than 500 GeV and the kinetic decoupling temperature is in the range of [4-100] MeV.

Replaced with version accepted for publication in Phys. Rev. Lett

References in corpus (3)

• What mass are the smallest protohalos?
• Effects of cold dark matter decoupling and pair annihilation on cosmological perturbations
• Early supersymmetric cold dark matter substructure

Cited by in corpus (17)

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• The Most Dark Matter Dominated Galaxies: Predicted Gamma-ray Signals from the Faintest Milky Way Dwarfs
• Dark Matter Annihilation in Substructures Revised
• The survival and disruption of CDM micro-haloes: implications for direct and indirect detection experiments
• Galactic Substructure and Direct Detection of Dark Matter
• Analytical Approach to Subhaloes Population in Dark Matter Haloes
• The Gamma-Ray-Flux Probability Distribution Function from Galactic Halo Substructure
• Angular Signatures of Dark Matter in the Diffuse Gamma Ray Background
• Search for Gamma-rays from Dark Matter annihilations around Intermediate Mass Black Holes with the H.E.S.S. experiment
• Can proper motions of dark-matter subhalos be detected?
• Dark matter caustics and the enhancement of self-annihilation flux
• Dark Matter Astrophysics
• Gamma ray and Neutrino fluxes from a cosmological dark matter simulation
• Constraining supersymmetry from the satellite experiments