Details

Autor(en) / Beteiligte

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

Titel

H.E.S.S. observations of the globular clusters NGC 6388 and M 15 and search for a Dark Matter signal

Ist Teil von

• The Astrophysical journal, 2011, Vol.735

Ort / Verlag

American Astronomical Society

Erscheinungsjahr

2011

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• Observations of the globular clusters NGC 6388 and M 15 were carried out by the H.E.S.S. array of Cherenkov telescopes for a live time of 27.2 and 15.2 hours respectively. No gamma-ray signal is found at the nominal target position of NGC 6388 and M 15. In the primordial formation scenario, globular clusters are formed in a dark matter halo and dark matter could still be present in the baryon-dominated environment of globular clusters. This opens the possibility of observing a dark matter self-annihilation signal. The dark matter content of the globular clusters NGC 6388 and M 15 is modelled taking into account the astrophysical processes that can be expected to influence the dark matter distribution during the evolution of the globular cluster: the adiabatic contraction of dark matter by baryons, the adiabatic growth of a black hole in the dark matter halo and the kinetic heating of dark matter by stars. 95% confidence level exclusion limits on the dark matter particle velocity-weighted annihilation cross section are derived for these dark matter haloes. In the TeV range, the limits on the velocity-weighted annihilation cross section are derived at the 10-25 cm3 s-1 level and a few 10-24 cm3 s-1 for NGC 6388 and M 15 respectively.