2011
DOI: 10.1016/j.astropartphys.2010.12.006
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H.E.S.S. constraints on dark matter annihilations towards the sculptor and carina dwarf galaxies

Abstract: The Sculptor and Carina Dwarf spheroidal galaxies were observed with the H.E.S.S. Cherenkov telescope array between January 2008 and December 2009. The data sets consist of a total of 11.8 and 14.8 hours of high quality data, respectively. No gamma-ray signal was detected at the nominal positions of these galaxies above 220 GeV and 320 GeV, respectively. Upper limits on the gamma-ray fluxes at 95% C.L. assuming two forms for the spectral energy distribution (a power law shape and one derived from dark matter a… Show more

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Cited by 91 publications
(82 citation statements)
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“…It has been estimated that DES might discovery 19-37 new dwarf galaxies during the duration of the Fermi-LAT mission (31). At higher energies, ground-based imaging atmospheric Cherenkov telescopes (IACTs) have observed dwarf spheroidals but have not found a signal (32)(33)(34). Their limits for high WIMP masses are typically several orders of magnitudes away from the thermal relic interaction rate and are therefore not (yet) competitive with limits from the Fermi-LAT at lower energies.…”
Section: Observational Resultsmentioning
confidence: 99%
“…It has been estimated that DES might discovery 19-37 new dwarf galaxies during the duration of the Fermi-LAT mission (31). At higher energies, ground-based imaging atmospheric Cherenkov telescopes (IACTs) have observed dwarf spheroidals but have not found a signal (32)(33)(34). Their limits for high WIMP masses are typically several orders of magnitudes away from the thermal relic interaction rate and are therefore not (yet) competitive with limits from the Fermi-LAT at lower energies.…”
Section: Observational Resultsmentioning
confidence: 99%
“…Upper gamma-ray flux limits from dwarf spheroidal galaxies, preferred observation targets due to their high mass-to-light ratio and low background, from observations with Fermi-LAT [121] and H.E.S.S. [122] have been included in the fit through AstroFit [82].…”
Section: Indirect Dark Matter Detectionmentioning
confidence: 99%
“…Over the last decade, a number of dSphs have been observed by the present generation of IACTs: MAGIC [17][18][19], H.E.S.S. [20][21][22] and VERITAS [23,24], as well as by the Large Area Telescope (LAT) on board the Fermi satellite [25].…”
Section: Introductionmentioning
confidence: 99%