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

被引：88

作者：

Aharonian, F. ^{[2
]}

Akhperjanian, A. G. ^{[3
]}

Bazer-Bachi, A. R. ^{[4
]}

Beilicke, M. ^{[5
]}

Benbow, W. ^{[2
]}

Berge, D. ^{[2
]}

Bernloehr, K. ^{[2
,6
]}

Boisson, C. ^{[7
]}

Bolz, O. ^{[2
]}

Borrel, V. ^{[4
]}

Braun, I. ^{[2
]}

Brion, E. ^{[1
]}

Brown, A. M. ^{[8
]}

Buehler, R. ^{[2
]}

Buesching, I. ^{[9
]}

Boutelier, T. ^{[17
]}

Carrigan, S. ^{[2
]}

Chadwick, P. M. ^{[8
]}

Chounet, L. -M. ^{[10
]}

Coignet, G. ^{[11
]}

Cornils, R. ^{[5
]}

Costamante, L. ^{[2
,22
]}

Degrange, B. ^{[10
]}

Dickinson, H. J. ^{[8
]}

Djannati-Ataie, A. ^{[12
]}

Drury, L. O'C. ^{[13
]}

Dubus, G. ^{[10
]}

Egberts, K. ^{[2
]}

Emmanoulopoulos, D. ^{[14
]}

Espigat, P. ^{[12
]}

Farnier, C. ^{[15
]}

Feinstein, F. ^{[15
]}

Ferrero, E. ^{[14
]}

Fiasson, A. ^{[15
]}

Fontaine, G. ^{[10
]}

Funk, Seb. ^{[2
,6
]}

Funk, S. ^{[2
]}

Fuessling, M. ^{[6
]}

Gallant, Y. A. ^{[15
]}

Giebels, B. ^{[10
]}

Glicenstein, J. F. ^{[1
]}

Glueck, B. ^{[16
]}

Goret, P. ^{[1
]}

Hadjichristidis, C. ^{[8
]}

Hauser, D. ^{[2
]}

Hauser, M. ^{[14
]}

Heinzelmann, G. ^{[5
]}

Henri, G. ^{[17
]}

Hermann, G. ^{[2
]}

Hinton, J. A. ^{[2
]}

机构：

[1] CE Saclay, DAPNIA DSM DSM CEA, F-91191 Gif Sur Yvette, France

[2] Max Planck Inst Kernphys, D-69029 Heidelberg, Germany

[3] Yerevan Phys Inst, Yerevan 375036, Armenia

[4] CNRS UPS, Ctr Etud Spatiale Rayonnements, F-31029 Toulouse 4, France

[5] Univ Hamburg, Inst Expt Phys, D-22761 Hamburg, Germany

[6] Humboldt Univ, Inst Phys, D-12489 Berlin, Germany

[7] Observ Paris, CNRS, UMR 8102, LUTH, F-92195 Meudon, France

[8] Univ Durham, Dept Phys, Durham DH1 3LE, England

[9] NW Univ, Unit Space Phys, ZA-2520 Potchefstroom, South Africa

[10] Ecole Polytech, IN2P3 CNRS, Lab Leprince Ringuet, F-91128 Palaiseau, France

[11] Lab Annecy Le Vieux Phys Particules, IN2P3 CNRS, F-74941 Annecy Le Vieux, France

[12] APC, F-75231 Paris, France

[13] Dublin Inst Adv Studies, Dublin 2, Ireland

[14] Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany

[15] Univ Montpellier 2, IN2P3 CNRS, Lab Phys Theor & Astroparticules, F-34095 Montpellier, France

[16] Univ Erlangen Nurnberg, Inst Phys, D-91058 Erlangen, Germany

[17] Univ Grenoble 1, INSU CNRS, Lab Astron & Astrophys, F-38041 Grenoble, France

[18] CNRS IN2P3, Univ Denis Diderot Paris 7, Univ Paris 06, LPNHE, F-75252 Paris, France

[19] Charles Univ Prague, Inst Particle & Nucl Phys, Prague 18000 8, Czech Republic

[20] Ruhr Univ Bochum, Inst Theoret Phys, Lehrstuhl 4, D-44780 Bochum, Germany

[21] Univ Namibia, Windhoek, Namibia

[22] CNRS & MPG, European Assoc Lab Gamma Ray Astron, Paris, France

来源：

ASTROPARTICLE PHYSICS | 2008年 / 29卷 / 01期

基金：

英国科学技术设施理事会;

关键词：

D O I：

10.1016/j.astropartphys.2007.11.007

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Observations of the Sagittarius dwarf spheroidal (Sgr dSph) galaxy were carried out with the HESS array of four imaging air Cherenkov telescopes in June 2006. A total of 11 h 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% CL flux limit of 3.6 x 10(-12) cm(-2) s(-1) above 250 GeV has been derived. Constraints on the velocity-weighted cross-section (sigma upsilon) 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% CL exclusion limit on (sigma upsilon) of the order of 2 x 10(-25) cm(3) s(-1) is obtained for a core profile in the 100 GeV-1 TeV neutralino mass range. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：55 / 62

页数：8

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