dc.contributor.author | Aharonian, F. | en_US |
dc.contributor.author | Büsching, I. | en_US |
dc.contributor.author | Holleran, M. | en_US |
dc.contributor.author | De Jager, O.C. | en_US |
dc.contributor.author | Raubenheimer, B.C. | en_US |
dc.contributor.author | Venter, C. | |
dc.contributor.author | H.E.S.S. Collaboration | |
dc.date.accessioned | 2010-08-04T15:37:38Z | |
dc.date.available | 2010-08-04T15:37:38Z | |
dc.date.issued | 2009 | en_US |
dc.identifier.citation | Aharonian, 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.issn | 0004-637X | |
dc.identifier.issn | 1538-4357 (Online) | |
dc.identifier.uri | http://hdl.handle.net/10394/3504 | |
dc.identifier.uri | https://doi.org/10.1088/0004-637X/691/1/175 | |
dc.description.abstract | A 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.publisher | EDP Sciences | |
dc.subject | Dark matter | |
dc.subject | Galaxies: dwarf | |
dc.subject | Gamma rays: observations | |
dc.title | A search for a dark matter annihilation signal toward the Canis Major overdensity with H.E.S.S. | en_US |
dc.contributor.researchID | 13235176 - Büsching, Ingo | |
dc.contributor.researchID | 10065857 - De Jager, Ocker Cornelis | |
dc.contributor.researchID | 10859748 - Holleran, Mathew | |
dc.contributor.researchID | 10179240 - Raubenheimer, Barend Christoffel | |
dc.contributor.researchID | 12006653 - Venter, Christo | |