Search for dark matter annihilation signatures in HESS observations of dwarf spheroidal galaxies

被引：77

作者：

Abramowski, A. ^{[1
]}

Aharonian, F. ^{[2
,3
,4
]}

Benkhali, F. Ait ^{[2
]}

Akhperjanian, A. G. ^{[4
,5
]}

Anguener, E. ^{[6
]}

Backes, M. ^{[7
]}

Balenderan, S. ^{[8
]}

Balzer, A. ^{[9
]}

Barnacka, A. ^{[10
,11
]}

Becherini, Y. ^{[12
]}

Tjus, J. Becker ^{[13
]}

Berge, D. ^{[9
,14
]}

Bernhard, S. ^{[15
]}

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

Birsin, E. ^{[6
]}

Biteau, J. ^{[16
,17
]}

Boettcher, M. ^{[18
]}

Boisson, C. ^{[19
]}

Bolmont, J. ^{[20
]}

Bordas, P. ^{[21
]}

Bregeon, J. ^{[22
]}

Brun, F. ^{[23
]}

Brun, P. ^{[23
]}

Bryan, M. ^{[9
]}

Bulik, T. ^{[24
]}

Carrigan, S. ^{[2
]}

Casanova, S. ^{[2
,25
]}

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

Chakraborty, N. ^{[2
]}

Chalme-Calvet, R. ^{[20
]}

Chaves, R. C. G. ^{[22
]}

Chretien, M. ^{[20
]}

Colafrancesco, S. ^{[26
]}

Cologna, G. ^{[27
]}

Conrad, J. ^{[28
]}

Couturier, C. ^{[20
]}

Cui, Y. ^{[21
]}

Dalton, M. ^{[29
]}

Davids, I. D. ^{[7
,18
]}

Degrange, B. ^{[16
]}

Deil, C. ^{[2
]}

deWilt, P. ^{[30
]}

Djannati-Atai, A. ^{[21
]}

Domainko, W. ^{[2
]}

Donath, A. ^{[2
]}

Drury, L. O'C. ^{[3
]}

Dubus, G. ^{[32
]}

Dutson, K. ^{[33
]}

Dyks, J. ^{[34
]}

Dyrda, M. ^{[25
]}

机构：

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

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

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

[4] Natl Acad Sci Republ Armenia, Yerevan 0019, Armenia

[5] Yerevan Phys Inst, Yerevan 375036, Armenia

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

[7] Univ Namibia, Dept Phys, Windhoek, Namibia

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

[9] Univ Amsterdam, Astron Inst Anton Pannekoek, GRAPPA, NL-1098 XH Amsterdam, Netherlands

[10] Uniwersytet Jagiellonski, Astron Observ, PL-30244 Krakow, Poland

[11] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

[12] Linnaeus Univ, Dept Phys & Elect Engn, S-35195 Vaxjo, Sweden

[13] Ruhr Univ Bochum, Inst Theoret Phys Lehrstuhl Weltraum & Astrophs 4, D-44780 Bochum, Germany

[14] Univ Amsterdam, Inst High Energy Phys, NL-1098 XH Amsterdam, Netherlands

[15] Leopold Franzens Univ, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria

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

[17] Univ Calif Santa Cruz, Dept Phys, Santa Cruz Inst Particle Phys, Santa Cruz, CA 95064 USA

[18] North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa

[19] Univ Paris Diderot, CNRS, LUTH, Observ Paris, F-92190 Meudon, France

[20] Univ Paris 07, Univ Paris 06, CNRS IN2P3, LPNHE, F-75252 Paris 5, France

[21] Univ Tubingen, Inst Astron & Astrophys, D-72076 Tubingen, Germany

[22] Univ Montpellier 2, CNRS, IN2P3, Lab Univ & Particules Montpellier, F-34095 Montpellier 5, France

[23] CEA Saclay, DSM Irfu, F-91191 Gif Sur Yvette, France

[24] Univ Warsaw, Astron Observ, PL-00478 Warsaw, Poland

[25] PAN, Inst Fizyki Jadrowej, PL-31342 Krakow, Poland

[26] Univ Witwatersrand, Sch Phys, ZA-2050 Johannesburg, South Africa

[27] Heidelberg Univ, D-69117 Heidelberg, Germany

[28] Stockholm Univ, Oskar Klein Ctr, Albanova Univ Ctr, Dept Phys, Stockholm, Sweden

[29] Univ Bordeaux 1, CNRS, IN2P3, CEN Bordeaux Gradignan, F-33175 Gradignan, France

[30] Univ Adelaide, Sch Chem & Phys, Adelaide, SA 5005, Australia

[31] Univ Paris Diderot, CNRS IN2P3, CEA Irfu, APC,Observ Paris,Sorbonne Paris Cite, F-75205 Paris 13, France

[32] UJF Grenoble 1, CNRS INSU, IPAG, UMR 5274, F-38041 Grenoble, France

[33] Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England

[34] Nicolaus Copernicus Astron Ctr, PL-00716 Warsaw, Poland

[35] Univ Potsdam, Inst Phys & Astron, D-14476 Golm, Germany

[36] Univ Savoie, CNRS, IN2P3, Lab Annecy Le Vieux Phys Particules, F-74941 Annecy Le Vieux, France

[37] DESY, D-15738 Zeuthen, Germany

[38] Univ Savoie, CNRS, Lab Annecy Le Vieux Phys Particules, F-74941 Annecy Le Vieux, France

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

[40] Nicholas Copernicus Univ, Ctr Astron, PL-87100 Torun, Poland

[41] Univ Free State, Dept Phys, ZA-9300 Bloemfontein, South Africa

[42] Charles Univ Prague, Fac Math & Phys, Inst Particle & Nucl Phys, CR-18000 Prague 8, Czech Republic

来源：

PHYSICAL REVIEW D | 2014年 / 90卷 / 11期

基金：

新加坡国家研究基金会; 英国科学技术设施理事会;

关键词：

EXPLORING HALO SUBSTRUCTURE; INTERNAL KINEMATICS; FORTRAN CODE; GIANT STARS; GAMMA-RAYS; PROFILES; SCULPTOR; VIEW; ENERGIES; PROGRAM;

D O I：

10.1103/PhysRevD.90.112012

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Dwarf spheroidal galaxies of the Local Group are close satellites of the Milky Way characterized by a large mass-to-light ratio and are not expected to be the site of nonthermal high-energy gamma-ray emission or intense star formation. Therefore they are among the most promising candidates for indirect dark matter searches. During the last years the High Energy Stereoscopic System (H.E.S.S.) of imaging atmospheric Cherenkov telescopes observed five of these dwarf galaxies for more than 140 hours in total, searching for TeV gamma-ray emission from annihilation of dark matter particles. The new results of the deep exposure of the Sagittarius dwarf spheroidal galaxy, the first observations of the Coma Berenices and Fornax dwarves and the reanalysis of two more dwarf spheroidal galaxies already published by the H.E.S.S. Collaboration, Carina and Sculptor, are presented. In the absence of a significant signal new constraints on the annihilation cross section applicable to weakly interacting massive particles (WIMPs) are derived by combining the observations of the five dwarf galaxies. The combined exclusion limit depends on the WIMP mass and the best constraint is reached at 1-2 TeV masses with a cross-section upper bound of similar to 3.9 x 10(-24) cm(3) s(-1) at a 95% confidence level.

引用

页数：15

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