SEARCH FOR DARK MATTER ANNIHILATION SIGNALS FROM THE FORNAX GALAXY CLUSTER WITH H.E.S.S.

被引：51

作者：

Abramowski, A. ^{[1
,21
]}

Acero, F. ^{[2
]}

Aharonian, F. ^{[3
,4
,5
]}

Akhperjanian, A. G. ^{[5
,6
]}

Anton, G. ^{[7
]}

Balzer, A. ^{[7
]}

Barnacka, A. ^{[8
,9
]}

de Almeida, U. Barres ^{[10
]}

Becherini, Y. ^{[11
,12
,33
]}

Becker, J. ^{[13
]}

Behera, B. ^{[14
]}

Bernloehr, K. ^{[3
,15
]}

Birsin, E. ^{[15
]}

Biteau, J. ^{[12
]}

Bochow, A. ^{[3
]}

Boisson, C. ^{[16
]}

Bolmont, J. ^{[17
]}

Bordas, P. ^{[18
]}

Brucker, J. ^{[7
]}

Brun, F. ^{[12
]}

Brun, P. ^{[9
]}

Bulik, T. ^{[19
]}

Bueching, I. ^{[13
,20
]}

Carrigan, S. ^{[3
]}

Casanova, S. ^{[13
]}

Cerruti, M. ^{[16
]}

Chadwick, P. M. ^{[10
]}

Charbonnier, A. ^{[17
]}

Chaves, R. C. G. ^{[3
]}

Cheesebrough, A. ^{[10
]}

Clapson, A. C. ^{[3
]}

Coignet, G. ^{[21
]}

Cologna, G. ^{[14
]}

Conrad, J. ^{[22
]}

Dalton, M. ^{[15
]}

Daniel, M. K. ^{[10
]}

Davids, I. D. ^{[23
]}

Degrange, B. ^{[12
]}

Deil, C. ^{[3
]}

Dickinson, H. J. ^{[22
]}

Djannati-Atai, A. ^{[11
,33
]}

Domainko, W. ^{[3
]}

Drury, L. O'C. ^{[4
]}

Dubus, G. ^{[24
]}

Dutson, K. ^{[25
]}

Dyks, J. ^{[8
]}

Dyrda, M. ^{[26
]}

Egberts, K. ^{[27
]}

Eger, P. ^{[7
]}

Espigat, P. ^{[11
,33
]}

机构：

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

[2] Univ Montpellier 2, CNRS IN2P3, CC 70, Lab Phys Theor & Astroparticules, F-34095 Montpellier 5, France

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

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

[5] Natl Acad Sci Republ Armenia, Yerevan, Armenia

[6] Yerevan Phys Inst, Yerevan 375036, Armenia

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

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

[9] CE Saclay, IRFU DSM CEA, F-91191 Gif Sur Yvette, France

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

[11] Univ Paris 07, CNRS, F-75205 Paris 13, France

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

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

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

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

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

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

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

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

[20] North West Univ, Unit Space Phys, ZA-2520 Potchefstroom, South Africa

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

[22] Royal Inst Technol KTH, Dept Phys, Oskar Klein Ctr, SE-10691 Stockholm, Sweden

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

[24] Univ Grenoble 1, INSU CNRS, Lab Astrophys Grenoble, F-38041 Grenoble 9, France

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

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

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

[28] Uniwersytet Jagiellonski, Obserwatorium Astron, PL-30244 Krakow, Poland

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

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

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

[32] Univ Leeds, Sch Phys & Astron, Leeds LS2 9JT, W Yorkshire, England

[33] Univ Paris 07, CEA, Observ Paris, CNRS,UMR 7164, F-75221 Paris 05, France

来源：

ASTROPHYSICAL JOURNAL | 2012年 / 750卷 / 02期

基金：

新加坡国家研究基金会;

关键词：

astroparticle physics; dark matter; galaxies: clusters: general; galaxies: clusters: individual (Fornax); gamma rays: galaxies: clusters; gamma rays: general; GAMMA-RAY EMISSION; COSMIC-RAYS; PERSEUS CLUSTER; CONSTRAINTS; MASS; ENERGIES; DYNAMICS; PARTICLE; SYSTEM; LIMITS;

D O I：

10.1088/0004-637X/750/2/123

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The Fornax galaxy cluster was observed with the High Energy Stereoscopic System for a total live time of 14.5 hr, searching for very high energy (VHE; E > 100GeV) gamma-rays from dark matter (DM) annihilation. No significant signal was found in searches for point-like and extended emissions. Using several models of the DM density distribution, upper limits on the DM velocity-weighted annihilation cross-section <sigma upsilon > as a function of the DM particle mass are derived. Constraints are derived for different DM particle models, such as those arising from Kaluza-Klein and supersymmetric models. Various annihilation final states are considered. Possible enhancements of the DM annihilation gamma-ray flux, due to DM substructures of the DM host halo, or from the Sommerfeld effect, are studied. Additional gamma-ray contributions from internal bremsstrahlung and inverse Compton radiation are also discussed. For a DM particle mass of 1 TeV, the exclusion limits at 95% of confidence level reach values of <sigma upsilon >(95% C.L.) similar to 10(-23) cm(3) s(-1), depending on the DM particle model and halo properties. Additional contribution from DM substructures can improve the upper limits on <sigma upsilon > by more than two orders of magnitude. At masses around 4.5 TeV, the enhancement by substructures and the Sommerfeld resonance effect results in a velocity-weighted annihilation cross-section upper limit at the level of <sigma upsilon >(95% C.L.) similar to 10(-26) cm(3) s(-1).

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页数：11

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