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dc.contributor.authorAharonian, F.en_US
dc.contributor.authorBüsching, I.en_US
dc.contributor.authorHolleran, M.en_US
dc.contributor.authorDe Jager, O.C.en_US
dc.contributor.authorRaubenheimer, B.C.en_US
dc.contributor.authorVenter, C.
dc.date.accessioned2010-08-04T15:37:38Z
dc.date.available2010-08-04T15:37:38Z
dc.date.issued2009en_US
dc.identifier.citationAharonian, F. et al. 2009. A search for a dark matter annihilation signal toward the Canis Major overdensity with H.E.S.S. Astrophysical journal, 691(1):175-181. [https://doi.org/10.1088/0004-637X/691/1/175]en_US
dc.identifier.issn0004-637X
dc.identifier.issn1538-4357 (Online)
dc.identifier.urihttp://hdl.handle.net/10394/3504
dc.identifier.urihttps://doi.org/10.1088/0004-637X/691/1/175
dc.description.abstractA search for a dark matter (DM) annihilation signal into γ -rays toward the direction of the Canis Major (CMa) overdensity is presented. The nature of CMa is still controversial and one scenario represents it as a dwarf galaxy, making it an interesting candidate forDMannihilation searches. A total of 9.6 hr of high-quality data were collected with theH.E.S.S. array of Imaging Atmospheric Cherenkov Telescopes, and no evidence for a very high energy γ -ray signal is found. Upper limits on the CMa dwarf galaxy mass of the order of 109M are derived at the 95% confidence level (CL) assuming neutralinomasses in the range 500 GeV–10 TeV and relatively large annihilation cross sections. Constraints on the velocity-weighted annihilation cross section σv are calculated for specific weakly interacting massive-particle scenarios, using a Navarro–Frenk–White model for the DM halo profile and taking advantage of numerical simulations of hierarchical structure formation. Assuming a total halo mass of 3 × 108M , 95% CL exclusion limits of the order of 5 × 10−24 cm3 s−1 are reached in the 500 GeV–10 TeV DM particle mass interval
dc.publisherEDP Sciences
dc.subjectDark matter
dc.subjectGalaxies: dwarf
dc.subjectGamma rays: observations
dc.titleA search for a dark matter annihilation signal toward the Canis Major overdensity with H.E.S.S.en_US
dc.contributor.researchID13235176 - Büsching, Ingo
dc.contributor.researchID10065857 - De Jager, Ocker Cornelis
dc.contributor.researchID10859748 - Holleran, Mathew
dc.contributor.researchID10179240 - Raubenheimer, Barend Christoffel
dc.contributor.researchID12006653 - Venter, Christo


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