Upper limit for γ-ray emission above 140 GeV from the dwarf spheroidal galaxy Draco

被引：62

作者：

Albert, J. ^{[2
]}

Aliu, E. ^{[3
]}

Anderhub, H. ^{[1
]}

Antoranz, P. ^{[4
]}

Backes, M. ^{[5
]}

Baixeras, C. ^{[6
]}

Barrio, J. A. ^{[4
]}

Bartko, H. ^{[7
]}

Bastieri, D. ^{[8
,9
]}

Becker, J. K. ^{[5
]}

Bednarek, W. ^{[10
]}

Berger, K. ^{[2
]}

Bigongiari, C. ^{[8
,9
]}

Biland, A. ^{[1
]}

Bock, R. K. ^{[7
,8
,9
]}

Bordas, P. ^{[11
]}

Bosch-Ramon, V. ^{[11
]}

Bretz, T. ^{[2
]}

Britvitch, I. ^{[1
]}

Camara, M. ^{[4
]}

Carmona, E. ^{[7
]}

Chilingarian, A. ^{[12
]}

Commichau, S. ^{[1
]}

Contreras, J. L. ^{[4
]}

Cortina, J. ^{[3
]}

Costado, M. T. ^{[13
,14
]}

Curtef, V. ^{[5
]}

Danielyan, V. ^{[12
]}

Dazzi, F. ^{[8
,9
]}

De Angelis, A. ^{[15
,16
]}

Delgado, C. ^{[13
]}

de los Reyes, R. ^{[4
]}

De Lotto, B. ^{[15
,16
]}

De Maria, M. ^{[15
,16
]}

De Sabata, F. ^{[15
,16
]}

Dorner, D. ^{[2
]}

Doro, M. ^{[8
,9
]}

Errando, M. ^{[3
]}

Fagiolini, M. ^{[17
,18
]}

Ferenc, D. ^{[19
]}

Fernandez, E. ^{[3
]}

Firpo, R. ^{[3
]}

Fonseca, M. V. ^{[4
]}

Font, L. ^{[6
]}

Fuchs, M. ^{[7
]}

Galante, N. ^{[7
]}

Garcia-Lopez, R. J. ^{[13
,14
]}

Garczarczyk, M. ^{[7
]}

Gaug, M. ^{[13
]}

Goebel, F. ^{[7
]}

机构：

[1] ETH, CH-8093 Zurich, Switzerland

[2] Univ Wurzburg, D-97074 Wurzburg, Germany

[3] IFAE, E-08193 Barcelona, Spain

[4] Univ Complutense, E-28040 Madrid, Spain

[5] Univ Dortmund, D-44227 Dortmund, Germany

[6] Univ Autonoma Barcelona, E-08193 Barcelona, Spain

[7] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany

[8] Univ Padua, I-35131 Padua, Italy

[9] Ist Nazl Fis Nucl, I-35131 Padua, Italy

[10] Univ Lodz, PL-90236 Lodz, Poland

[11] Univ Barcelona, E-08028 Barcelona, Spain

[12] Yerevan Phys Inst, AM-375036 Yerevan, Armenia

[13] Inst Astrofis Canarias, E-38200 San Cristobal la Laguna, Tenerife, Spain

[14] Univ La Laguna, Dept Astrofis, E-38206 Tenerife, Spain

[15] Univ Udine, I-33100 Udine, Italy

[16] INFN Trieste, I-33100 Udine, Italy

[17] Univ Siena, I-53100 Siena, Italy

[18] INFN Pisa, I-53100 Siena, Italy

[19] Univ Calif Davis, Davis, CA 95616 USA

[20] Turku Univ, Tuorla Observ, FI-21500 Piikkio, Finland

[21] Inst Nucl Energy Res, BG-1784 Sofia, Bulgaria

[22] CSIC, Inst Astrofis Andalucia, E-18008 Granada, Spain

[23] Osserv Astron Trieste, INAF, I-34131 Trieste, Italy

[24] Ist Nazl Fis Nucl, I-34131 Trieste, Italy

[25] Univ Pisa, I-56126 Pisa, Italy

[26] Ist Nazl Fis Nucl, I-56126 Pisa, Italy

[27] ICREA, E-08193 Barcelona, Spain

[28] CSIC, IEEC, Inst Ciencias Espai, E-08193 Barcelona, Spain

[29] Humboldt Univ, D-12489 Berlin, Germany

来源：

ASTROPHYSICAL JOURNAL | 2008年 / 679卷 / 01期

关键词：

dark matter; galaxies : dwarf; galaxies : individual (Draco); gamma rays : observations;

D O I：

10.1086/529135

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The nearby dwarf spheroidal galaxy Draco, with its high mass to light ratio, is one of the most auspicious targets for indirect dark matter (DM) searches. Annihilation of hypothetical DM particles can result in high-energy gamma-rays, e. g., from neutralino annihilation in the supersymmetric framework. A search for a possible DM signal originating from Draco was performed with the MAGIC telescope during 2007. Analysis of the data results in a flux upper limit (2 sigma) of 1.1 x 10(-11) photons cm(-2) s(-1) for photon energies above 140 GeV, assuming a pointlike source. A comparison with predictions from supersymmetric models is also given. While our results do not constrain the mSUGRA phase parameter space, a very high flux enhancement can be ruled out.

引用

页码：428 / 431

页数：4

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