H.E.S.S. 对船底座星云及其神秘碰撞风双星 Eta Carinae 的观测
高能天体物理现象
2015-06-04 v1 星系天体物理
摘要
大质量双星系统 Eta Carinae 及其周围的 HII 复合体——船底座星云，是潜在的粒子加速场所，预期可产生甚高能 (VHE; E > 100 GeV) \gamma 射线辐射。本文展示了 H.E.S.S. 望远镜阵列从 2004 年至 2010 年进行的 VHE \gamma 射线观测所收集的数据，覆盖了 Eta Carinae 的完整轨道周期。在 33.1 小时的数据集中，未发现来自 Eta Carinae 的显著 \gamma 射线辐射迹象，并在 470 GeV 能量阈值以上导出了 7.7 x 10-13 ph cm-2 s-1 的 \gamma 射线通量上限（99% 置信水平）。结合 Fermi-LAT 探测到高达 100 GeV 的高能 (HE; 0.1 GeV > E > 100 GeV) \gamma 射线辐射，并假设平均 HE 谱指数延续至 VHE 能域，这些结果表明在 HE 和 VHE \gamma 射线能区之间存在谱截断。这可能是由加速粒子分布的截断或风碰撞区域中严重的 \gamma-\gamma\ 吸收损耗引起的。此外，对来自船底座星云的延展 \gamma 射线辐射的搜索得出了 4.2 x 10-12 ph cm-2 s-1 的 \gamma 射线通量上限（99% 置信水平）。导出的宇宙线增强因子上限约为 23，并与针对老年混合形态超新星遗迹 W 28 发现的结果进行了比较。
引用
@article{arxiv.1204.5690,
title = {H.E.S.S. observations of the Carina nebula and its enigmatic colliding wind binary Eta Carinae},
author = {HESS Collaboration and A. Abramowski and F. Acero and F. Aharonian and A. G. Akhperjanian and G. Anton and A. Balzer and A. Barnacka and Y. Becherini and J. Becker and K. Bernlöhr and E. Birsin and J. Biteau and A. Bochow and C. Boisson and J. Bolmont and P. Bordas and J. Brucker and F. Brun and P. Brun and T. Bulik and I. Büsching and S. Carrigan and S. Casanova and M. Cerruti and P. M. Chadwick and A. Charbonnier and R. C. G. Chaves and A. Cheesebrough and G. Cologna and J. Conrad and M. Dalton and M. K. Daniel and I. D. Davids and B. Degrange and C. Deil 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 K. Egberts and P. Eger and P. Espigat and L. Fallon and S. Fegan and F. Feinstein and M. V. Fernandes and A. Fiasson and G. Fontaine and A. Förster and M. Füßling and Y. A. Gallant and T. Garrigoux and H. Gast and L. Gèrard and B. Giebels and J. F. Glicenstein and B. Glück and D. Göring and M. -H. Grondin and S. Häffner and J. D. Hague and J. Hahn and D. Hampf and J. Harris and M. Hauser and S. Heinz and G. Heinzelmann and G. Henri and G. Hermann 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 I. Jung and M. A. Kastendieck and K. Katarzyński and U. Katz and S. Kaufmann and B. Khélifi and D. Klochkov and W. Kluźniak and T. Kneiske and Nu. Komin and K. Kosack and R. Kossakowski and F. Krayzel and H. Laffon and G. Lamanna and J. -P. Lenain and D. Lennarz and T. Lohse and A. Lopatin and C. -C. Lu and V. Marandon and A. Marcowith and J. Masbou and G. Maurin and N. Maxted and M. Mayer and T. J. L. McComb and M. C. Medina and J. Méhault and R. Moderski and M. Mohamed and E. Moulin and C. L. Naumann and M. Naumann-Godo and M. de Naurois and D. Nedbal and D. Nekrassov and N. Nguyen and B. Nicholas and J. Niemiec and S. J. Nolan and S. Ohm and E. de Oña Wilhelmi and B. Opitz and M. Ostrowski and I. Oya and M. Panter 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 G. Pühlhofer and M. Punch and A. Quirrenbach and M. Raue and A. Reimer and O. Reimer and M. Renaud and R. de los Reyes and F. Rieger and J. Ripken and L. Rob 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 A. Schulz and U. Schwanke and S. Schwarzburg and S. Schwemmer and F. Sheidaei and J. L. Skilton and H. Sol and G. Spengler and Ł. Stawarz and R. Steenkamp and C. Stegmann and F. Stinzing and K. Stycz and I. Sushch and A. Szostek and J. -P. Tavernet and R. Terrier and M. Tluczykont and K. Valerius and C. van Eldik and G. Vasileiadis and C. Venter and A. Viana and P. Vincent and H. J. Völk and F. Volpe and S. Vorobiov and M. Vorster and S. J. Wagner and M. Ward and R. White and A. Wierzcholska and M. Zacharias and A. Zajczyk and A. A. Zdziarski and A. Zech and H. -S. Zechlin and T. Montmerle},
journal= {arXiv preprint arXiv:1204.5690},
year = {2015}
}
备注
8 pages, 3 figures, accepted for publication in MNRAS