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arXiv · 1103.3266

Search for a Dark Matter annihilation signal from the Galactic Center halo with H.E.S.S

H. E. S. S. Collaboration·:·A. Abramowski·F. Acero·F. Aharonian·A. G. Akhperjanian·G. Anton·A. Barnacka·U. Barres de Almeida·A. R. Bazer-Bachi·Y. Becherini·J. Becker·B. Behera·K. Bernlöhr·A. Bochow·C. Boisson·J. Bolmont·P. Bordas·V. Borrel·J. Brucker·F. Brun·P. Brun·T. Bulik·I. Büsching·S. Carrigan·S. Casanova·M. Cerruti·P. M. Chadwick·A. Charbonnier·R. C. G. Chaves·A. Cheesebrough·L. -M. Chounet·A. C. Clapson·G. Coignet·J. Conrad·M. Dalton·M. K. Daniel·I. D. Davids·B. Degrange·C. Deil·H. J. Dickinson·A. Djannati-Ataï·W. Domainko·L. O'C. Drury·F. Dubois·G. Dubus·J. Dyks·M. Dyrda·K. Egberts·P. Eger·P. Espigat·L. Fallon·C. Farnier·S. Fegan·F. Feinstein·M. V. Fernandes·A. Fiasson·G. Fontaine·A. Förster·M. Füßling·Y. A. Gallant·H. Gast·L. Gérard·D. Gerbig·B. Giebels·J. F. Glicenstein·B. Glück·P. Goret·D. Göring·J. D. Hague·D. Hampf·M. Hauser·S. Heinz·G. Heinzelmann·G. Henri·G. Hermann·J. A. Hinton·A. Hoffmann·W. Hofmann·P. Hofverberg·D. Horns·A. Jacholkowska·O. C. de Jager·C. Jahn·M. Jamrozy·I. Jung·M. A. Kastendieck·K. Katarzynski·U. Katz·S. Kaufmann·D. Keogh·M. Kerschhaggl·D. Khangulyan·B. Khélifi·D. Klochkov·W. Kluźniak·T. Kneiske·Nu. Komin·K. Kosack·R. Kossakowski
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Abstract

A search for a very-high-energy (VHE; >= 100 GeV) gamma-ray signal from self-annihilating particle Dark Matter (DM) is performed towards a region of projected distance r ~ 45-150 pc from the Galactic Center. The background-subtracted gamma-ray spectrum measured with the High Energy Stereoscopic System (H.E.S.S.) gamma-ray instrument in the energy range between 300 GeV and 30 TeV shows no hint of a residual gamma-ray flux. Assuming conventional Navarro-Frenk-White (NFW) and Einasto density profiles, limits are derived on the velocity-weighted annihilation cross section < σv> as a function of the DM particle mass. These are among the best reported so far for this energy range. In particular, for the DM particle mass of ~1 TeV, values for <σv> above 3 * 10^(-25) cm^3 s^(-1) are excluded for the Einasto density profile. The limits derived here differ much less for the chosen density profile parametrizations, as opposed to limits from gamma-ray observations of dwarf galaxies or the very center of the Milky Way, where the discrepancy is significantly larger.

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H. E. S. S. Collaboration, :, A. Abramowski, F. Acero, F. Aharonian, A. G. Akhperjanian, G. Anton, A. Barnacka, U. Barres de Almeida, A. R. Bazer-Bachi, Y. Becherini, J. Becker, B. Behera, K. Bernlöhr, A. Bochow, C. Boisson, J. Bolmont, P. Bordas, V. Borrel, J. Brucker, F. Brun, P. Brun, T. Bulik, I. Büsching, S. Carrigan, S. Casanova, M. Cerruti, P. M. Chadwick, A. Charbonnier, R. C. G. Chaves, A. Cheesebrough, L. -M. Chounet, A. C. Clapson, G. Coignet, J. Conrad, M. Dalton, M. K. Daniel, I. D. Davids, B. Degrange, C. Deil, H. J. Dickinson, A. Djannati-Ataï, W. Domainko, L. O'C. Drury, F. Dubois, G. Dubus, J. Dyks, M. Dyrda, K. Egberts, P. Eger, P. Espigat, L. Fallon, C. Farnier, S. Fegan, F. Feinstein, M. V. Fernandes, A. Fiasson, G. Fontaine, A. Förster, M. Füßling, Y. A. Gallant, H. Gast, L. Gérard, D. Gerbig, B. Giebels, J. F. Glicenstein, B. Glück, P. Goret, D. Göring, J. D. Hague, D. Hampf, M. Hauser, S. Heinz, G. Heinzelmann, G. Henri, G. Hermann, J. A. Hinton, A. Hoffmann, W. Hofmann, P. Hofverberg, D. Horns, A. Jacholkowska, O. C. de Jager, C. Jahn, M. Jamrozy, I. Jung, M. A. Kastendieck, K. Katarzynski, U. Katz, S. Kaufmann, D. Keogh, M. Kerschhaggl, D. Khangulyan, B. Khélifi, D. Klochkov, W. Kluźniak, T. Kneiske, Nu. Komin, K. Kosack, R. Kossakowski. 2011-03-16. Search for a Dark Matter annihilation signal from the Galactic Center halo with H.E.S.S. https://doi.org/10.1103/physrevlett.106.161301

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