Can Astrophysical Gamma Ray Sources Mimic Dark Matter Annihilation in Galactic Satellites?

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The nature of the cosmic dark matter is unknown. The most compelling hypothesis is that dark matter consists of weakly interacting massive particles (WIMPs) in the 100 GeV mass range. Such particles would annihilate in the galactic halo, producing high-energy gamma rays which might be detectable in gamma ray telescopes such as the GLAST satellite. We investigate the ability of GLAST to distinguish between the WIMP annihilation spectrum and the spectrum of known astrophysical source classes. Focusing on the emission from the galactic satellite halos predicted by the cold dark matter model, we find that the WIMP gamma-ray spectrum is ... continued below

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4 pages

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Baltz, Edward A.; /KIPAC, Menlo Park; Taylor, James E.; U., /Waterloo; Wai, Lawrence L. & /KIPAC, Menlo Park November 1, 2006.

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The nature of the cosmic dark matter is unknown. The most compelling hypothesis is that dark matter consists of weakly interacting massive particles (WIMPs) in the 100 GeV mass range. Such particles would annihilate in the galactic halo, producing high-energy gamma rays which might be detectable in gamma ray telescopes such as the GLAST satellite. We investigate the ability of GLAST to distinguish between the WIMP annihilation spectrum and the spectrum of known astrophysical source classes. Focusing on the emission from the galactic satellite halos predicted by the cold dark matter model, we find that the WIMP gamma-ray spectrum is unique; the separation from known source classes can be done in a convincing way. We discuss the follow-up of possible WIMP sources with Imaging Atmospheric Cerenkov Telescopes. Finally we discuss the impact that Large Hadron Collider data might have on the study of galactic dark matter.

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4 pages

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  • Journal Name: Astrophysical Journal Letters

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  • Report No.: SLAC-PUB-12173
  • Grant Number: AC02-76SF00515
  • Office of Scientific & Technical Information Report Number: 894566
  • Archival Resource Key: ark:/67531/metadc882363

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  • November 1, 2006

Added to The UNT Digital Library

  • Sept. 22, 2016, 2:13 a.m.

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  • Nov. 22, 2016, 9:53 p.m.

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Baltz, Edward A.; /KIPAC, Menlo Park; Taylor, James E.; U., /Waterloo; Wai, Lawrence L. & /KIPAC, Menlo Park. Can Astrophysical Gamma Ray Sources Mimic Dark Matter Annihilation in Galactic Satellites?, article, November 1, 2006; [Menlo Park, California]. (digital.library.unt.edu/ark:/67531/metadc882363/: accessed November 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.