利用 H.E.S.S.和费米 LAT 观测探测 HESS J1834-087 的伽马射线辐射
高能天体物理现象
2015-06-22 v1
摘要
此前的 HESS 观测揭示了一个扩展的甚高能（VHE; E>100 GeV）伽马射线源 HESS J1834-087 的存在，其与超新星遗迹 W41 重合。我们利用 HESS 和费米 LAT 进一步调查了伽马射线辐射的起源。由 61 小时（HESS）和 4 年（费米 LAT）观测提供的伽马射线数据覆盖了超过 5 个数量级的能量范围（1.8GeV - 30TeV）。我们研究了 TeV 和 GeV 源的形态和能谱，并利用多波段数据调查了观测到的辐射起源。TeV 源可以建模为两个分量之和：一个点状分量和一个显著扩展的分量（sig_TeV = 0.17{\deg}），两者均以超新星遗迹 W41 为中心，且能谱由指数为 2.6 的幂律描述。费米探测到的 GeV 源是扩展的（sig_GeV =0.15{\deg}），在形态上与 VHE 辐射相匹配。其能谱可由指数为 2.15 的幂律描述，并与整个 TeV 源的能谱平滑连接。能谱在 100 GeV 附近出现一个折点。提出了两种主要情景来解释该辐射：脉冲星风云（PWN）或超新星遗迹 W41 与分子云的相互作用。X 射线观测表明，在超新星遗迹中心附近存在一个点状源（脉冲星候选体）以及非热 X 射线弥漫辐射，这可能源于潜在的 PWN。PWN 情景得到了 TeV 和 GeV 位置与假定脉冲星相匹配的支持。然而，只有当高自转减慢功率脉冲星注入过量低能电子时，单区轻子模型才能重现整体能谱。如果点状 TeV 源与扩展的 GeV 和 TeV 源无关，则不需要这种低能分量。相互作用超新星遗迹情景得到了伽马射线源的空间重合、OH 脉泽线的探测以及强子建模的支持。
引用
@article{arxiv.1407.0862,
title = {Probing the gamma-ray emission from HESS J1834-087 using H.E.S.S. and Fermi LAT observations},
author = {The H. E. S. S. Collaboration and : and A. Abramowski and F. Aharonian and F. Ait Benkhali and A. G. Akhperjanian and E. Angüner and G. Anton and M. Backes and S. Balenderan and A. Balzer and A. Barnacka and Y. Becherini and J. Becker Tjus and K. Bernlöhr and E. Birsin and E. Bissaldi and J. Biteau and M. Böttcher and C. Boisson and J. Bolmont and P. Bordas and J. Brucker and F. Brun and P. Brun and T. Bulik and S. Carrigan and S. Casanova and P. M. Chadwick and R. Chalme-Calvet and R. C. G. Chaves and A. Cheesebrough and M. Chrétien and S. Colafrancesco and G. Cologna and J. Conrad and C. Couturier and Y. Cui and M. Dalton and M. K. Daniel and I. D. Davids and B. Degrange and C. Deil and P. deWilt and H. J. Dickinson and A. Djannati-Ataï and W. Domainko and L. O'C. Drury and G. Dubus and K. Dutson and J. Dyks and M. Dyrda and T. Edwards and K. Egberts and P. Eger and P. Espigat and C. Farnier and S. Fegan and F. Feinstein and M. V. Fernandes and D. Fernandez and A. Fiasson and G. Fontaine and A. Förster and M. Füßling and M. Gajdus and Y. A. Gallant and T. Garrigoux and G. Giavitto and B. Giebels and J. F. Glicenstein and M. -H. Grondin and M. Grudzińska and S. Häffner and J. Hahn and J. Harris and G. Heinzelmann and G. Henri and G. Hermann and O. Hervet and A. Hillert and J. A. Hinton and W. Hofmann and P. Hofverberg and M. Holler and D. Horns and A. Jacholkowska and C. Jahn and M. Jamrozy and M. Janiak and F. Jankowsky and I. Jung and M. A. Kastendieck and K. Katarzyński and U. Katz and S. Kaufmann and B. Khélifi and M. Kieffer and S. Klepser and D. Klochkov and W. Kluźniak and T. Kneiske and D. Kolitzus and Nu. Komin and K. Kosack and S. Krakau and F. Krayzel and P. P. Krüger and H. Laffon and G. Lamanna and J. Lefaucheur and A. Lemière and M. Lemoine-Goumard and J. -P. Lenain and T. Lohse and A. Lopatin and C. -C. Lu and V. Marandon and A. Marcowith and R. Marx and G. Maurin and N. Maxted and M. Mayer and T. J. L. McComb and J. Méhault and P. J. Meintjes and U. Menzler and M. Meyer and R. Moderski and M. Mohamed and E. Moulin and T. Murach and C. L. Naumann and M. de Naurois and J. Niemiec and S. J. Nolan and L. Oakes and H. Odaka and S. Ohm and E. de Oña Wilhelmi and B. Opitz and M. Ostrowski and I. Oya and M. Panter and R. D. Parsons and M. Paz Arribas and N. W. Pekeur and G. Pelletier and J. Perez and P. -O. Petrucci and B. Peyaud and S. Pita and H. Poon and G. Pühlhofer and M. Punch and A. Quirrenbach and S. Raab and M. Raue and I. Reichardt and A. Reimer and O. Reimer and M. Renaud and R. de los Reyes and F. Rieger and L. Rob and C. Romoli and S. Rosier-Lees and G. Rowell and B. Rudak and C. B. Rulten and V. Sahakian and D. A. Sanchez and A. Santangelo and R. Schlickeiser and F. Schüssler and A. Schulz and U. Schwanke and S. Schwarzburg and S. Schwemmer and H. Sol and G. Spengler and F. Spies and Ł. Stawarz and R. Steenkamp and C. Stegmann and F. Stinzing and K. Stycz and I. Sushch and J. -P. Tavernet and T. Tavernier and A. M. Taylor and R. Terrier and M. Tluczykont and C. Trichard and K. Valerius and C. van Eldik and B. van Soelen and G. Vasileiadis and C. Venter and A. Viana and P. Vincent and H. J. Völk and F. Volpe and M. Vorster and T. Vuillaume and S. J. Wagner and P. Wagner and R. M. Wagner and M. Ward and M. Weidinger and Q. Weitzel and R. White and A. Wierzcholska and P. Willmann and A. Wörnlein and D. Wouters and R. Yang and V. Zabalza and M. Zacharias and A. A. Zdziarski and A. Zech and H. -S. Zechlin and Fermi-LAT Collaboration and F. Acero and J. M. Casandjian and J. Cohen-Tanugi and F. Giordano and L. Guillemot and J. Lande and H. Pletsch and Y. Uchiyama},
journal= {arXiv preprint arXiv:1407.0862},
year = {2015}
}
备注
12 pages, 8 figures, Accepted for publication in Astronomy & Astrophysics