Indirect Dark Matter Detection Limits from the Ultra-Faint Milky Way Satellite Segue 1

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We use new kinematic data from the ultra-faint Milky Way satellite Segue 1 to model its dark matter distribution and derive upper limits on the dark matter annihilation cross-section. Using gamma-ray ux upper limits from the Fermi satellite and MAGIC, we determine cross-section exclusion regions for dark matter annihilation into a variety of different particles including charged leptons. We show that these exclusion regions are beginning to probe the regions of interest for a dark matter interpretation of the electron and positron uxes from PAMELA, Fermi, and HESS, and that future observations of Segue 1 have strong prospects for testing ... continued below

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15 pages

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Essig, Rouven; /SLAC; Sehgal, Neelima; Strigari, Louis E.; /KIPAC, Menlo Park /Stanford U., Phys. Dept.; Geha, Marla et al. August 11, 2011.

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We use new kinematic data from the ultra-faint Milky Way satellite Segue 1 to model its dark matter distribution and derive upper limits on the dark matter annihilation cross-section. Using gamma-ray ux upper limits from the Fermi satellite and MAGIC, we determine cross-section exclusion regions for dark matter annihilation into a variety of different particles including charged leptons. We show that these exclusion regions are beginning to probe the regions of interest for a dark matter interpretation of the electron and positron uxes from PAMELA, Fermi, and HESS, and that future observations of Segue 1 have strong prospects for testing such an interpretation. We additionally discuss prospects for detecting annihilation with neutrinos using the IceCube detector, finding that in an optimistic scenario a few neutrino events may be detected. Finally we use the kinematic data to model the Segue 1 dark matter velocity dispersion and constrain Sommerfeld enhanced models.

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15 pages

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  • Journal Name: Phys.Rev.D82:123503,2010; Journal Volume: 82

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  • Report No.: SLAC-PUB-14200
  • Grant Number: AC02-76SF00515
  • Office of Scientific & Technical Information Report Number: 1023777
  • Archival Resource Key: ark:/67531/metadc836018

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  • August 11, 2011

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  • May 19, 2016, 3:16 p.m.

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  • Dec. 8, 2016, 8:20 p.m.

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Essig, Rouven; /SLAC; Sehgal, Neelima; Strigari, Louis E.; /KIPAC, Menlo Park /Stanford U., Phys. Dept.; Geha, Marla et al. Indirect Dark Matter Detection Limits from the Ultra-Faint Milky Way Satellite Segue 1, article, August 11, 2011; United States. (digital.library.unt.edu/ark:/67531/metadc836018/: accessed September 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.