H.E.S.S 对 Geminga 脉冲星周围扩展伽马射线辐射的探测
高能天体物理现象
2023-05-24 v1
摘要
Geminga 是一颗神秘的射电宁静伽马射线脉冲星，距地球仅 250 pc。该脉冲星周围的甚高能伽马射线扩展辐射由 Milagro 发现，后经 HAWC 证实，两者均为基于水切伦科夫探测器的实验。然而，尽管进行了针对性观测，Gamma 射线中 Geminga 脉冲星风云存在的证据长期未能被成像大气切伦科夫望远镜（IACTs）探测到。在角尺度 > 2 度的伽马射线辐射探测对 IACT 数据分析中的背景估计提出了相当大的挑战。随着对水切伦科夫与大气切伦科夫仪器互补背景估计技术理解的近期进展，H.E.S.S. IACT 阵列现可确认探测到 Geminga 脉冲星周围半径至少 3 度、能量范围 0.5-40 TeV 的高度扩展伽马射线辐射。我们未发现具有统计显著性的不对称性或能量依赖形态的迹象。在脉冲星周围 1 度半径区域内，于 1 TeV 处获得的流量归一化为 cmsTeV。为研究脉冲星周围高能轻子晕内的粒子输运，我们向数据拟合了一个电子扩散模型。在 100 TeV 电子能量下获得的扩散系数归一化 cms，与先前报道的 Geminga 周围脉冲星晕的值相符，且明显低于银河系平均值。
引用
@article{arxiv.2304.02631,
title = {Detection of extended gamma-ray emission around the Geminga pulsar with H.E.S.S},
author = {H. E. S. S. Collaboration and : and F. Aharonian and F. Ait Benkhali and J. Aschersleben and H. Ashkar and M. Backes and V. Barbosa Martins and R. Batzofin and Y. Becherini and D. Berge and K. Bernlöhr and B. Bi and M. Böttcher and C. Boisson and J. Bolmont and J. Borowska and M. Bouyahiaoui and F. Bradascio and R. Brose and F. Brun and B. Bruno and T. Bulik and C. Burger Scheidlin and F. Cangemi and S. Caroff and S. Casanova and J. Celic and M. Cerruti and P. Chambery and T. Chand and S. Chandra and A. Chen and J. Chibueze and O. Chibueze and G. Cotter and J. Damascene Mbarubucyeye and J. Devin and A. Djannati-Ataï and A. Dmytriiev and K. Egberts and S. Einecke and J. P. Ernenwein and K. Feijen and G. Fichet de Clairfontaine and M. Filipovic and G. Fontaine and M. Füssling and S. Funk and S. Gabici and Y. A. Gallant and S. Ghafourizadeh and G. Giavitto and L. Giunti and D. Glawion and J. F. Glicenstein and P. Goswami and G. Grolleron and M. -H. Grondin and L. Haerer and M. Haupt and G. Hermann and J. A. Hinton and W. Hofmann and T. L. Holch and M. Holler and D. Horns and Zhiqiu Huang and M. Jamrozy and F. Jankowsky and V. Joshi and I. Jung-Richardt and E. Kasai and K. Katarzyński and B. Khélifi and W. Kluźniak and Nu. Komin and K. Kosack and D. Kostunin and R. G. Lang and S. Le Stum and F. Leitl and A. Lemière and M. Lemoine-Goumard and J. -P. Lenain and F. Leuschner and T. Lohse and A. Luashvili and I. Lypova and J. Mackey and D. Malyshev and V. Marandon and P. Marchegiani and A. Marcowith and P. Marinos and G. Martí-Devesa and R. Marx and G. Maurin and P. J. Meintjes and M. Meyer and A. Mitchell and R. Moderski and L. Mohrmann and A. Montanari and E. Moulin and J. Muller and K. Nakashima and M. de Naurois and J. Niemiec and A. Priyana Noel and P. O'Brien and S. Ohm and L. Olivera-Nieto and E. de Ona Wilhelmi and M. Ostrowski and S. Panny and M. Panter and R. D. Parsons and G. Peron and D. A. Prokhorov and G. Pühlhofer and A. Quirrenbach and A. Reimer and O. Reimer and M. Renaud and B. Reville and F. Rieger and G. Rowell and B. Rudak and H. Rueda Ricarte and E. Ruiz-Velasco and V. Sahakian and H. Salzmann and A. Santangelo and M. Sasaki and F. Schüssler and H. M. Schutte and U. Schwanke and J. N. S. Shapopi and A. Sinha and H. Sol and A. Specovius and S. Spencer and Ł. Stawarz and S. Steinmassl and I. Sushch and H. Suzuki and T. Takahashi and T. Tanaka and T. Tavernier and A. M. Taylor and R. Terrier and C. Thorpe-Morgan and M. Tsirou and N. Tsuji and M. Vecchi and C. Venter and J. Vink and S. J. Wagner and R. White and A. Wierzcholska and Yu Wun Wong and M. Zacharias and D. Zargaryan and A. A. Zdziarski and A. Zech and S. Zouari and N. Żywucka},
journal= {arXiv preprint arXiv:2304.02631},
year = {2023}
}
备注
16 pages, 15 figures, 7 tables. Accepted for publication in Astronomy & Astrophysics