Discovery of VHE emission towards the Carina arm region with the HESS telescope array: HESSJ1018-589

被引：24

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
]}

Becherini, Y. ^{[10
,11
]}

Becker, J. ^{[12
]}

Bernloehr, K. ^{[3
,13
]}

Birsin, E. ^{[13
]}

Biteau, J. ^{[11
]}

Bochow, A. ^{[3
]}

Boisson, C. ^{[14
]}

Bolmont, J. ^{[15
]}

Bordas, P. ^{[16
]}

Brucker, J. ^{[7
]}

Brun, F. ^{[11
]}

Brun, P. ^{[9
]}

Bulik, T. ^{[17
]}

Buesching, I. ^{[12
,18
]}

Carrigan, S. ^{[3
]}

Casanova, S. ^{[3
,18
]}

Cerruti, M. ^{[14
]}

Chadwick, P. M. ^{[19
]}

Charbonnier, A. ^{[15
]}

Chaves, R. C. G. ^{[3
,9
]}

Cheesebrough, A. ^{[19
]}

Cologna, G. ^{[20
]}

Conrad, J. ^{[21
]}

Dalton, M. ^{[13
]}

Daniel, M. K. ^{[19
]}

Davids, I. D. ^{[22
]}

Degrange, B. ^{[11
]}

Deil, C. ^{[3
]}

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

Djannati-Atai, A. ^{[10
]}

Domainko, W. ^{[3
]}

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

Dubus, G. ^{[23
]}

Dutson, K. ^{[24
]}

Dyks, J. ^{[8
]}

Dyrda, M. ^{[25
]}

Egberts, K. ^{[26
]}

Eger, P. ^{[7
]}

Espigat, P. ^{[10
]}

Fallon, L. ^{[4
]}

Fegan, S. ^{[11
]}

Feinstein, F. ^{[2
]}

Fernandes, M. V. ^{[1
]}

机构：

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

[2] Univ Montpellier 2, CNRS, IN2P3, Lab Univers & Particules Montpellier, 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] CEA Saclay, DSM IRFU, F-91191 Gif Sur Yvette, France

[10] Univ Paris 07, CEA, Observ Paris, CNRS,UMR 7164, F-75205 Paris 13, France

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

[29] Nicolaus 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] CNRS & MPG, European Associated Lab Gamma Ray Astron, Paris, France

来源：

ASTRONOMY & ASTROPHYSICS | 2012年 / 541卷

基金：

新加坡国家研究基金会; 美国国家航空航天局; 英国科学技术设施理事会;

关键词：

gamma rays: stars; ISM: individual objects: SNRG284.3-1.8; ISM: individual objects: 1FGL J1018.6-5856; ISM: individual objects: PSRJ1016-5857; ENERGY GAMMA-RAYS; PHOTON IMAGING CAMERA; XMM-NEWTON; MOLECULAR CLOUDS; NEBULA; TEV; ACCELERATION; RADIATION;

D O I：

10.1051/0004-6361/201218843

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The Carina arm region, containing the supernova remnant SNRG284.3-1.8, the high-energy (HE; E > 100 MeV) binary 1FGL J1018.6-5856 and the energetic pulsar PSRJ1016-5857 and its nebula, has been observed with the H. E. S. S. telescope array. The observational coverage of the region in very-high-energy (VHE; E > 0.1TeV) gamma-rays benefits from deep exposure (40 h) of the neighboring open cluster Westerlund 2. The observations have revealed a new extended region of VHE gamma-ray emission. The new VHE source HESS J1018-589 shows a bright, point-like emission region positionally coincident with SNRG284.3-1.8 and 1FGL J1018.6-5856 and a diffuse extension towards the direction of PSRJ1016-5857. A soft (Gamma = 2.7 +/- 0.5(stat)) photon index, with a differential flux at 1 TeV of N-0 = (4.2 +/- 1.1) x 10(-13) TeV-1 cm(-2) s(-1) is found for the point-like source, whereas the total emission region including the diffuse emission region is well fit by a power-law function with spectral index Gamma = 2.9 +/- 0.4(stat) and differential flux at 1 TeV of N-0 = (6.8 +/- 1.6) x 10(-1)3 TeV-1 cm(-2) s(-1). This H. E. S. S. detection motivated follow-up X-ray observations with the XMM-Newton satellite to investigate the origin of the VHE emission. The analysis of the XMM-Newton data resulted in the discovery of a bright, non-thermal point-like source (XMMU J101855.4-58564) with a photon index of Gamma = 1.65 +/- 0.08 in the center of SNRG284.3-1.8, and a thermal, extended emission region coincident with its bright northern filament. The characteristics of this thermal emission are used to estimate the plasma density in the region as n approximate to 0.5 cm(-3) (2.9 kpc/d)(2). The position of XMMUJ101855.4-58564 is compatible with the position reported by the Fermi-LAT collaboration for the binary system 1FGL J1018.6-5856 and the variable Swift XRT source identified with it. The new X-ray data are used alongside archival multi-wavelength data to investigate the relationship between the VHE gamma-ray emission from HESS J1018-589 and the various potential counterparts in the Carina arm region.

引用

页数：9

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