HESS OBSERVATIONS OF THE GLOBULAR CLUSTERS NGC 6388 AND M15 AND SEARCH FOR A DARK MATTER SIGNAL

被引:28
作者
Abramowski, A. [1 ]
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 ]
Bazer-Bachi, A. R. [11 ]
Becherini, Y. [12 ,13 ,34 ]
Becker, J. [14 ]
Behera, B. [15 ]
Bernloehr, K. [3 ,16 ]
Bochow, A. [3 ]
Boisson, C. [17 ]
Bolmont, J. [18 ]
Bordas, P. [19 ]
Borrel, V. [11 ]
Brucker, J. [7 ]
Brun, F. [13 ]
Brun, P. [9 ]
Bulik, T. [20 ]
Buesching, I. [21 ]
Carrigan, S. [3 ]
Casanova, S. [3 ,14 ]
Cerruti, M. [17 ]
Chadwick, P. M. [10 ]
Charbonnier, A. [18 ]
Chaves, R. C. G. [3 ]
Cheesebrough, A. [10 ]
Chounet, L-M [13 ]
Clapson, A. C. [3 ]
Coignet, G. [22 ]
Conrad, J. [23 ]
Dalton, M. [16 ]
Daniel, M. K. [10 ]
Davids, I. D. [24 ]
Degrange, B. [13 ]
Deil, C. [3 ]
Dickinson, H. J. [23 ]
Djannati-Atai, A. [12 ,34 ]
Domainko, W. [3 ]
Drury, L. O'C [4 ]
Dubois, F. [22 ]
Dubus, G. [25 ]
Dyks, J. [8 ]
Dyrda, M. [26 ]
Egberts, K. [27 ]
Eger, P. [7 ]
Espigat, P. [12 ,34 ]
机构
[1] Univ Hamburg, Inst Expt Phys, D-22761 Hamburg, Germany
[2] Univ Montpellier 2, CNRS, IN2P3, 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, CEA, DSM, IRFU, F-91191 Gif Sur Yvette, France
[10] Univ Durham, Dept Phys, Durham DH1 3LE, England
[11] UPS, CNRS, Ctr Etud Spatiale Rayonnements, F-31029 Toulouse 4, France
[12] Univ Paris 07, CNRS, Astroparticule & Cosmol APC, F-75205 Paris 13, France
[13] Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France
[14] Ruhr Univ Bochum, Inst Theoret Phys, Lehrstuhl Weltraum & Astrophys 4, D-44780 Bochum, Germany
[15] Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany
[16] Humboldt Univ, Inst Phys, D-12489 Berlin, Germany
[17] Univ Paris Diderot, CNRS, Observ Paris, LUTH, F-92190 Meudon, France
[18] Univ Paris 07, Univ Paris 06, LPNHE, CNRS,IN2P3, F-75252 Paris 5, France
[19] Univ Tubingen, Inst Astron & Astrophys, D-72076 Tubingen, Germany
[20] Univ Warsaw, Astron Observ, PL-00478 Warsaw, Poland
[21] North West Univ, Unit Space Phys, ZA-2520 Potchefstroom, South Africa
[22] IN2P3, CNRS, Lab Annecy Le Vieux Phys Particules, F-74941 Annecy Le Vieux, France
[23] Royal Inst Technol KTH, Dept Phys, Oskar Klein Ctr, SE-10691 Stockholm, Sweden
[24] Univ Namibia, Dept Phys, Windhoek, Namibia
[25] Univ Grenoble 1, CNRS, INSU, Lab Astrophys Grenoble, F-38041 Grenoble 9, France
[26] Inst Fizyki Jadrowej PAN, PL-31342 Krakow, Poland
[27] Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria
[28] Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England
[29] Uniwersytet Jagiellonski, Obserwatorium Astron, PL-30244 Krakow, Poland
[30] Nicholas Copernicus Univ, Torun Ctr Astron, PL-87100 Torun, Poland
[31] Univ Adelaide, Sch Chem & Phys, Adelaide, SA 5005, Australia
[32] Charles Univ Prague, Fac Math & Phys, Inst Particle & Nucl Phys, CR-18000 Prague 8, Czech Republic
[33] Univ Leeds, Sch Phys & Astron, Leeds L2S 9JT, W Yorkshire, England
[34] Univ Paris 07, CEA, Observ Paris, CNRS,UMR 7164, F-75221 Paris 05, France
[35] CNRS, European Associated Lab Gamma Ray Astron, F-75700 Paris, France
基金
新加坡国家研究基金会;
关键词
black hole physics; dark matter; gamma rays: general; globular clusters: individual (NGC 6388; M15); MASS BLACK-HOLE; SPACE-TELESCOPE EVIDENCE; GAMMA-RAY EMISSION; VELOCITY DISPERSION; DENSITY PROFILE; XMM-NEWTON; GALAXY; ANNIHILATION; CONTRACTION; CANDIDATE;
D O I
10.1088/0004-637X/735/1/12
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Observations of the globular clusters (GCs) NGC 6388 and M15 were carried out by the High Energy Stereoscopic System array of Cherenkov telescopes for a live time of 27.2 and 15.2 hr, respectively. No gamma-ray signal is found at the nominal target position of NGC 6388 and M15. In the primordial formation scenario, GCs are formed in a dark matter (DM) halo and DM could still be present in the baryon-dominated environment of GCs. This opens the possibility of observing a DM self-annihilation signal. The DM content of the GCs NGC 6388 and M15 is modeled taking into account the astrophysical processes that can be expected to influence the DM distribution during the evolution of the GC: the adiabatic contraction of DM by baryons, the adiabatic growth of a black hole in the DM halo, and the kinetic heating of DM by stars. Ninety-five percent confidence level exclusion limits on the DM particle velocity-weighted annihilation cross section are derived for these DM halos. In the TeV range, the limits on the velocity-weighted annihilation cross section are derived at the 10(-25) cm(3) s(-1) level and a few 10(-24) cm(3) s(-1) for NGC 6388 and M15, respectively.
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