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arXiv 2108.02015astro-ph.HE
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LMC N132D:一个成熟的超新星遗迹,其幂律gamma-ray光谱超过8 TeV

LMC N132D: A mature supernova remnant with a power-law gamma-ray spectrum extending beyond 8 TeV

H. E. S. S. Collaboration, :, H. Abdalla, F. Aharonian, F. Ait Benkhali, E. O. Angüner, C. Arcaro, C. Armand, T. Armstrong, H. Ashkar, M. Backes, V. Baghmanyan,… 展开作者

H. E. S. S. Collaboration, :, H. Abdalla, F. Aharonian, F. Ait Benkhali, E. O. Angüner, C. Arcaro, C. Armand, T. Armstrong, H. Ashkar, M. Backes, V. Baghmanyan, V. Barbosa Martins, A. Barnacka, M. Barnard, Y. Becherini, D. Berge, K. Bernlöhr, B. Bi, M. Böttcher, C. Boisson, J. Bolmont, M. de Bony de Lavergne, M. Breuhaus, F. Brun, P. Brun, M. Bryan, M. Büchele, T. Bulik, T. Bylund, S. Caroff, A. Carosi, S. Casanova, T. Chand, S. Chandra, A. Chen, G. Cotter, M. Curyło, J. Damascene Mbarubucyeye, I. D. Davids, J. Davies, C. Deil, J. Devin, L. Dirson, A. Djannati-Atai, A. Dmytriiev, A. Donath, V. Doroshenko, L. Dreyer, C. Duffy, J. Dyks, K. Egberts, F. Eichhorn, S. Einecke, G. Emery, J. -P. Ernenwein, K. Feijen, S. Fegan, A. Fiasson, G. Fichet de Clairfontaine, G. Fontaine, S. Funk, M. Füßling, S. Gabici, Y. A. Gallant, G. Giavitto, L. Giunti, D. Glawion, J. F. Glicenstein, M. -H. Grondin, J. Hahn, M. Haupt, G. Hermann, J. A. Hinton, W. Hofmann, C. Hoischen, T. L. Holch, M. Holler, M. Hörbe, D. Horns, D. Huber, M. Jamrozy, D. Jankowsky, F. Jankowsky, A. Jardin-Blicq, V. Joshi, I. Jung-Richardt, E. Kasai, M. A. Kastendieck, K. Katarzynski, U. Katz, D. Khangulyan, B. Khélifi, S. Klepser, W. Kluźniak, Nu. Komin, R. Konno, K. Kosack, D. Kostunin, M. Kreter, G. Lamanna, A. Lemière, M. Lemoine-Goumard, J. -P. Lenain, F. Leuschner, C. Levy, T. Lohse, I. Lypova, J. Mackey, J. Majumdar, D. Malyshev, D. Malyshev, V. Marandon, P. Marchegiani, A. Marcowith, A. Mares, G. Martí-Devesa, R. Marx, G. Maurin, P. J. Meintjes, M. Meyer, A. Mitchell, R. Moderski, L. Mohrmann, A. Montanari, C. Moore, P. Morris, E. Moulin, J. Muller, T. Murach, K. Nakashima, A. Nayerhoda, M. de Naurois, H. Ndiyavala, J. Niemiec, L. Oakes, P. O'Brien, H. Odaka, S. Ohm, L. Olivera-Nieto, E. de Ona Wilhelmi, M. Ostrowski, S. Panny, M. Panter, R. D. Parsons, G. Peron, B. Peyaud, Q. Piel, S. Pita, V. Poireau, A. Priyana Noel, D. A. Prokhorov, H. Prokoph, G. Pühlhofer, M. Punch, A. Quirrenbach, S. Raab, R. Rauth, P. Reichherzer, A. Reimer, O. Reimer, Q. Remy, M. Renaud, F. Rieger, L. Rinchiuso, C. Romoli, G. Rowell, B. Rudak, E. Ruiz-Velasco, V. Sahakian, S. Sailer, H. Salzmann, D. A. Sanchez, A. Santangelo, M. Sasaki, M. Scalici, J. Schäfer, F. Schüssler, H. M. Schutte, U. Schwanke, M. Seglar-Arroyo, M. Senniappan, A. S. Seyffert, N. Shafi, J. N. S. Shapopi, K. Shiningayamwe, R. Simoni, A. Sinha, H. Sol, A. Specovius, S. Spencer, M. Spir-Jacob, L. Stawarz, L. Sun, R. Steenkamp, C. Stegmann, S. Steinmassl, C. Steppa, T. Takahashi, T. Tavernier, A. M. Taylor, R. Terrier, J. H. E. Thiersen, D. Tiziani, M. Tluczykont, L. Tomankova, C. Trichard, M. Tsirou, R. Tuffs, Y. Uchiyama, D. J. van der Walt, C. van Eldik, C. van Rensburg, B. van Soelen, G. Vasileiadis, J. Veh, C. Venter, P. Vincent, J. Vink, H. J. Völk, Z. Wadiasingh, S. J. Wagner, J. Watson, F. Werner, R. White, A. Wierzcholska, Yu Wun Wong, A. Yusafzai, M. Zacharias, R. Zanin, D. Zargaryan, A. A. Zdziarski, A. Zech, S. J. Zhu, J. Zorn, S. Zouari, N. Żywucka

摘要:

我们分析了252小时的高能立体系统(H.E.S.S.)在对大麦云云进行深度调查期间,在2004年12月至2016年3月期间积累了对超新星遗迹(SNR)LMC N132 D的观测,在先前公布的数据集上增加了104小时的观测,以确保> 5 sigma的检测。为了扩大对光谱能量分布建模所需的伽马射线光谱覆盖范围,还包括对Fermi-LAT Pass 8数据的分析。我们明确地检测N132 D在非常高的能量(VHE)与5.7西格玛的显着性。我们报告的结果,其频谱和本地化的基础上扩展的H.E.S.S.数据集对扩展的H.E.S.S和Fermi-LAT数据的联合分析结果表明,N132 D的光谱能量分布在1.7 GeV到14.8 TeV的能量范围内,这表明N132 D在GeV和TeV能量下具有高亮度。我们设定了一个下限的伽马射线截止能量为8 TeV的置信水平为95%。与物理模型相比,新的伽马射线光谱以及N132 D的多波长观测表明VHE伽马射线发射的强子起源。SNR N132 D是一个VHE伽马射线源,它的光谱延伸到VHE域,而在几TeV处没有光谱截止,这与更年轻的富氧SNR仙后座A不同。N132 D的伽马射线特性可能受到与附近分子云相互作用的影响,该分子云部分位于源位置的95%置信区域内。[摘要]

英文摘要:

We analyzed 252 hours of High Energy Stereoscopic System (H.E.S.S.) observations towards the supernova remnant (SNR) LMC N132D that were accumulated between December 2004 and March 2016 during a deep survey of the Large Magellanic Cloud, adding 104 hours of observations to the previously published data set to ensure a > 5 sigma detection. To broaden the gamma-ray spectral coverage required for modeling the spectral energy distribution, an analysis of Fermi-LAT Pass 8 data was also included. We unambiguously detect N132D at very high energies (VHE) with a significance of 5.7 sigma. We report the results of a detailed analysis of its spectrum and localization based on the extended H.E.S.S. data set. The joint analysis of the extended H.E.S.S and Fermi-LAT data results in a spectral energy distribution in the energy range from 1.7 GeV to 14.8 TeV, which suggests a high luminosity of N132D at GeV and TeV energies. We set a lower limit on a gamma-ray cutoff energy of 8 TeV with a confidence level of 95%. The new gamma-ray spectrum as well as multiwavelength observations of N132D when compared to physical models suggests a hadronic origin of the VHE gamma-ray emission. SNR N132D is a VHE gamma-ray source that shows a spectrum extending to the VHE domain without a spectral cutoff at a few TeV, unlike the younger oxygen-rich SNR Cassiopeia A. The gamma-ray properties of N132D may be affected by an interaction with a nearby molecular cloud that partially lies inside the 95% confidence region of the source position. [Abridged]

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