利用 H.E.S.S. 表征银河系中心 200 秒差距内的甚高能弥漫发射
高能天体物理现象
2018-04-11 v1
摘要
H.E.S.S. 在银河系中心 200 pc 范围内观测到的弥漫甚高能 (VHE, > 100 GeV) 伽马射线发射，被发现在直至距离银河系中心 (GC) 约 130 pc 的纵向距离上遵循中心分子区 (CMZ) 内的致密物质分布，在此之后流量迅速下降。最近高灵敏度的 H.E.S.S. 分析表明，宇宙射线 (CR) 密度分布随着到中心的距离而下降，使得数据与 GC 处存在一个稳定的宇宙 PeVatron 相容。在本文中，我们扩展了这项分析，首次获得了与物质相关性的详细表征，并在内部 200 pc 内寻找额外特征和单个伽马射线源。利用 250 小时的 H.E.S.S. 数据和改进的分析技术，我们对从 GC 脊观测到的弥漫 VHE 发射进行了详细的形态学研究，并重建了其总谱。我们表明，与致密物质相关的发射覆盖了整个 CMZ，其流量约为总弥漫发射流量的一半。我们还在较高纬度探测到一些发射，这可能是由 CR 在 GC 介质较不致密区域发生的强子碰撞产生的。我们探测到一个以 GC 为中心、延伸约 15 pc 的额外发射分量，这与存在强 CR 密度梯度相一致，并证实了我们银河系最中心存在一个 CR 加速器。我们表明，整个脊弥漫发射的光谱与先前从中心区域导出的光谱相容，表明单一粒子群充满了整个 CMZ。最后，我们报告了在 GC 射电弧附近发现了一个 VHE 伽马射线源，并论证它是由脉冲星风云候选体 G0.13-0.11 产生的。
引用
@article{arxiv.1706.04535,
title = {Characterising the VHE diffuse emission in the central 200 parsecs of our Galaxy with H.E.S.S},
author = {H. E. S. S. Collaboration and : and H. Abdalla and A. Abramowski and F. Aharonian and F. Ait Benkhali and A. G. Akhperjaniany and T. Andersson and E. O. Angüner and M. Arakawa and M. Arrieta and P. Aubert and M. Backes and A. Balzer and M. Barnard and Y. Becherini and J. Becker Tjus and D. Berge and S. Bernhard and K. Bernlöhr and R. Blackwell and M. Böttcher and C. Boisson and J. Bolmont and S. Bonnefoy and P. Bordas and J. Bregeon and F. Brun and P. Brun and M. Bryan and M. Büchele and T. Bulik and M. Capasso and J. Carr and S. Casanova and M. Cerruti and N. Chakraborty and R. C. G. Chaves and A. Chen and J. Chevalier and M. Coffaro and S. Colafrancesco and G. Cologna and B. Condon and J. Conrad and Y. Cui and I. D. Davids and J. Decock and B. Degrange and C. Deil and J. Devin and P. deWilt and L. Dirson and A. Djannati-Ataï and W. Domainko and A. Donath and L. O. C. Drury and K. Dutson and J. Dyks and T. Edwards and K. Egberts and P. Eger and J. P. Ernenwein and S. Eschbach and C. Farnier and S. Fegan and M. V. Fernandes and A. Fiasson and G. Fontaine and A. Förster and S. Funk and M. Füßling and S. Gabici and Y. A. Gallant and T. Garrigoux and G. Giavitto and B. Giebels and J. F. Glicenstein and D. Gottschall and A. Goyal and M. H. Grondin and J. Hahn and M. Haupt and J. Hawkes and G. Heinzelmann and G. Henri and G. Hermann and J. A. Hinton and W. Hofmann and C. Hoischen and T. L. Holch and M. Holler and D. Horns and A. Ivascenko and H. Iwasaki and A. Jacholkowska and M. Jamrozy and M. Janiak and D. Jankowsky and F. Jankowsky and M. Jingo and T. Jogler and L. Jouvin and I. Jung-Richardt and M. A. Kastendieck and K. Katarzynski and M. Katsuragawa and U. Katz and D. Kerszberg and D. Khangulyan and B. Khélifi and J. King and S. Klepser and D. Klochkov and W. Kluzniak and D. Kolitzus and Nu. Komin and K. Kosack and S. Krakau1 and M. Kraus and P. P. Krüger and H. Laffon and G. Lamanna and J. Lau and J. P. Lees and J. Lefaucheur and V. Lefranc and A. Lemière and M. Lemoine-Goumard and J. P. Lenain and E. Leser and T. Lohse and M. Lorentz and R. Liu and R. Lopez-Coto and I. Lypova and V. Marandon and A. Marcowith and C. Mariaud and R. Marx and G. Maurin and N. Maxted and M. Mayer and P. J. Meintjes and M. Meyer and A. M. W. Mitchel and R. Moderski and M. Mohamed and L. Mohrmann and K. Morå and E. Moulin and T. Murach and S. Nakashima and M. de Naurois and F. Niederwanger and J. Niemiec and L. Oakes and P. O Brien and H. Odaka and S. Ohm and M. Ostrowski and I. Oya and M. Padovani and M. Panter and R. D. Parsons and N. W. Pekeur and G. Pelletier and C. Perennes and P. O. Petrucci and B. Peyaud and Q. Piel and S. Pita and H. Poon and D. Prokhorov and H. Prokoph and G. Pühlhofer and M. Punch and A. Quirrenbach and S. Raab and R. Rauth and A. Reimer and O. Reimer and M. Renaud and R. de los Reyes and S. Richter and F. Rieger and C. Romoli and G. Rowell and B. Rudak and C. B. Rulten and V. Sahakian and S. Saito and D. Salek and D. A. Sanchez and A. Santangelo and M. Sasaki and R. Schlickeiser and F. Schüssler and A. Schulz and U. Schwanke and S. Schwemmer and M. Seglar-Arroyo and M. Settimo and A. S. Seyffert and N. Shafi and I. Shilon and R. Simoni and H. Sol and F. Spanier and G. Spengler and F. Spies and L. Stawarz and R. Steenkamp and C. Stegmann and K. Stycz and I. Sushch and T. Takahashi and J. P. Tavernet and T. Tavernier and A. M. Taylor and R. Terrier and L. Tibaldo and D. Tiziani and M. Tluczykont and C. Trichard and N. Tsuji and R. Tuffs and Y. Uchiyama and D. J. van der Walt and C. van Eldik and C. van Rensburg and B. van Soelen and G. Vasileiadis and J. Veh and C. Venter and A. Viana and P. Vincent and J. Vink and F. Voisin and H. J. Völk and T. Vuillaume and Z. Wadiasingh and S. J. Wagner and P. Wagner and R. M. Wagner and R. White and A. Wierzcholska and P. Willmann and A. Wörnlein and D. Wouters and R. Yang and D. Zaborov and M. Zacharias and R. Zanin and A. A. Zdziarski and A. Zech and F. Zefi and A. Ziegler and N. Zywucka},
journal= {arXiv preprint arXiv:1706.04535},
year = {2018}
}