Observations of the Sagittarius dwarf galaxy by the HESS experiment and search for a dark matter signal

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dc.contributor.authorAharonian, F.
dc.contributor.authorAkhperjanian, A.
dc.contributor.authorBazer-Bachi, A.
dc.contributor.authorBeilicke, M.
dc.contributor.authorBenbow, W.
dc.contributor.authorBerge, D.
dc.contributor.authorBernlohr, K.
dc.contributor.authorBoisson, C.
dc.contributor.authorBolz, O.
dc.contributor.authorBorrel, V.
dc.contributor.authorBraun, I.
dc.contributor.authorBrion, E.
dc.contributor.authorBrown, A.
dc.contributor.authorBuhler, R.
dc.contributor.authorBusching, I.
dc.contributor.authorBoutelier, T.
dc.contributor.authorCarrigan, S.
dc.contributor.authorChadwick, P.
dc.contributor.authorChounet, L.
dc.contributor.authorCoignet, G.
dc.contributor.authoret al.
dc.date.issued2008
dc.descriptionCopyright © 2008. Astropart.Phys. Submitted to Cornell University’s online archive www.arXiv.org in 2008 by Moulin Emmanuel. Post-print sourced from www.arxiv.org.
dc.description.abstractObservations of the Sagittarius dwarf spheroidal (Sgr dSph) galaxy were carried out with the H.E.S.S. array of four imaging air Cherenkov telescopes in June 2006. A total of 11 hours of high quality data are available after data selection. There is no evidence for a very high energy gamma-ray signal above the energy threshold at the target position. A 95% C.L. flux limit of 3.6 x 10-12 cm-2s-1 above 250 GeV has been derived. Constraints on the velocity-weighted cross section <sigma v> are calculated in the framework of Dark Matter particle annihilation using realistic models for the Dark Matter halo profile of Sagittarius dwarf galaxy. Two different models have been investigated encompassing a large class of halo types. A 95% C.L. exclusion limit on <sigma v> of the order of 2 x 10-25 cm3s-1 is obtained for a core profile in the 100 GeV - 1 TeV neutralino mass range.
dc.description.statementofresponsibilityHESS Collaboration. F. Aharonian...G. Rowell...and M. Ward...et al
dc.identifier.citationAstroparticle Physics, 2008; 29(1):55-62
dc.identifier.doi10.1016/j.astropartphys.2007.11.007
dc.identifier.issn0927-6505
dc.identifier.issn1873-2852
dc.identifier.orcidRowell, G. [0000-0002-9516-1581]
dc.identifier.urihttp://hdl.handle.net/2440/54002
dc.language.isoen
dc.publisherElsevier Science BV
dc.source.urihttps://doi.org/10.1016/j.astropartphys.2007.11.007
dc.subjectGamma-rays: observations
dc.subjectDwarf spheroidal galaxy
dc.subjectDark matter
dc.titleObservations of the Sagittarius dwarf galaxy by the HESS experiment and search for a dark matter signal
dc.typeJournal article
pubs.publication-statusPublished

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