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Sagittarius dwarf spheroidal galaxy observed by H.E.S.S

Abstract : Dwarf spheroidal galaxies are characterized by a large measured mass-to-light ratio and are not expected to be the site of high-luminosity non-thermal high-energy gamma-ray emissions. Therefore they are among the most promising candidates for indirect searches of dark matter particle annihilation signals in gamma rays. The Sagittarius dwarf spheroidal galaxy has been regularly observed by the High Energy Stereoscopic System (H.E.S.S.) of Cherenkov telescopes for more than 90 hours, searching for TeV gamma-ray emission from annihilation of dark matter particles. In absence of a significant signal, new constraints on the annihilation crosssection of the dark matter particles applicable for Majorana Weakly Interacting Massive Particles (WIMPs) are derived.
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http://hal.in2p3.fr/in2p3-00907580
Contributor : Claudine Bombar <>
Submitted on : Thursday, November 21, 2013 - 2:32:50 PM
Last modification on : Wednesday, July 22, 2020 - 9:54:06 AM

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  • HAL Id : in2p3-00907580, version 1
  • ARXIV : 1307.4918

Citation

G. Lamanna, C. Farnier, A. Jacholkowska, M. Kieffer, C. Trichard. Sagittarius dwarf spheroidal galaxy observed by H.E.S.S. 33rd International Cosmic Ray Conference (ICRC2013), Jul 2013, Rio de Janeiro, Brazil. ⟨in2p3-00907580⟩

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