Discovery of gamma-ray emission from the extragalactic pulsar wind nebula N 157B with HESS

被引：17

作者：

Abramowski, A. ^{[1
]}

Acero, F. ^{[2
]}

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

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

Anton, G. ^{[7
]}

Balenderan, S. ^{[8
]}

Balzer, A. ^{[7
]}

Barnacka, A. ^{[9
,10
]}

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

Becker, J. ^{[13
]}

Bernloehr, K. ^{[3
,14
]}

Birsin, E. ^{[14
]}

Biteau, J. ^{[12
]}

Bochow, A. ^{[3
]}

Boisson, C. ^{[15
]}

Bolmont, J. ^{[16
]}

Bordas, P. ^{[17
]}

Brucker, J. ^{[7
]}

Brun, F. ^{[12
]}

Brun, P. ^{[10
]}

Bulik, T. ^{[18
]}

Carrigan, S. ^{[3
]}

Casanova, S. ^{[3
,19
]}

Cerruti, M. ^{[15
]}

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

Charbonnier, A. ^{[16
]}

Chaves, R. C. G. ^{[3
,10
]}

Cheesebrough, A. ^{[8
]}

Cologna, G. ^{[20
]}

Conrad, J. ^{[21
]}

Couturier, C. ^{[16
]}

Dalton, M. ^{[14
,22
]}

Daniel, M. K. ^{[8
]}

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

Degrange, B. ^{[12
]}

Deil, C. ^{[3
]}

Dickinson, H. J. ^{[21
]}

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

Domainko, W. ^{[3
]}

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

Dubus, G. ^{[24
]}

Dutson, K. ^{[25
]}

Dyks, J. ^{[9
]}

Dyrda, M. ^{[26
]}

Egberts, K. ^{[27
]}

Eger, P. ^{[7
]}

Espigat, P. ^{[11
]}

Fallon, L. ^{[4
]}

Farnier, C. ^{[21
]}

Fegan, S. ^{[12
]}

机构：

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

[2] Univ Montpellier 2, Lab Univers & Particules Montpellier, CNRS IN2P3, CC 72, 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] Univ Durham, Dept Phys, Durham DH1 3LE, England

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

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

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

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

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

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

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

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

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

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

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

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

[21] Stockholm Univ, Albanova Univ Ctr, Oskar Klein Ctr, Dept Phys, S-10691 Stockholm, Sweden

[22] Univ Bordeaux 1, Ctr Etud Nucl Bordeaux Gradignan, CNRS IN2P3, F-33175 Gradignan, France

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

[24] UJF Grenoble 1 CNRS INSU, IPAG, UMR 5274, F-38041 Grenoble, 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] Univ Savoie, Lab Annecy Le Vieux Phys Particules, CNRS IN2P3, F-74941 Annecy Le Vieux, France

[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 LS2 9JT, W Yorkshire, England

来源：

ASTRONOMY & ASTROPHYSICS | 2012年 / 545卷

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：

gamma rays: general; pulsars: individual: PSR J0537-6910; ISM: supernova remnants; Magellanic Clouds; SUPERNOVA REMNANT; NEUTRON-STARS; PERIOD; GALAXY; N157B;

D O I：

10.1051/0004-6361/201219906

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the significant detection of the first extragalactic pulsar wind nebula (PWN) detected in gamma rays, N 157B, located in the large Magellanic Cloud (LMC). Pulsars with high spin-down luminosity are found to power energised nebulae that emit gamma rays up to energies of several tens of TeV. N 157B is associated with PSR J0537-6910, which is the pulsar with the highest known spin-down luminosity. The High Energy Stereoscopic System telescope array observed this nebula on a yearly basis from 2004 to 2009 with a dead-time corrected exposure of 46 h. The gamma-ray spectrum between 600 GeV and 12 TeV is well-described by a pure power-law with a photon index of 2.8 +/- 0.2(stat) +/- 0.3(syst) and a normalisation at 1 TeV of (8.2 +/- 0.8(stat) +/- 2.5(syst)) x 10(-13) cm(-2) s(-1) TeV-1. A leptonic multi-wavelength model shows that an energy of about 4 x 10(49) erg is stored in electrons and positrons. The apparent efficiency, which is the ratio of the TeV gamma-ray luminosity to the pulsar's spin-down luminosity, 0.08% +/- 0.01%, is comparable to those of PWNe found in the Milky Way. The detection of a PWN at such a large distance is possible due to the pulsar's favourable spin-down luminosity and a bright infrared photon-field serving as an inverse-Compton-scattering target for accelerated leptons. By applying a calorimetric technique to these observations, the pulsar's birth period is estimated to be shorter than 10 ms.

引用

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