费米大视场望远镜数据标准点源分析的银河系星际辐射模型开发
高能天体物理现象
2016-04-27 v1
摘要
费米伽马射线空间望远镜搭载的大视场望远镜 (LAT) 探测到的大部分天体伽马射线起源于星际介质，即高能宇宙射线与星际核子和光子相互作用时产生。传统的点源和延展源研究依赖于对这种弥漫辐射的建模以实现精确表征。本文描述了银河系星际辐射模型 (GIEM) 的开发，该模型已被 LAT 合作组采纳为标准模型并公开可用。该模型基于银河系中心环带中的星际气体柱密度图与银河系内产生的逆康普顿辐射图的线性组合。我们还在 GIEM 中包含了大尺度结构，如环 I 和费米气泡。测量的气体发射率谱证实，宇宙射线质子密度在距银河系中心超过 5 kpc 处随银河系中心距离的增加而减小。测量结果还表明质子谱随银河系中心距离的增加而变软。我们观察到费米气泡的边界在纬度低于 20 度时形状类似于悬链线，并观察到向其底部增强的辐射，该辐射向北和南银纬方向延伸，位于距银河系中心 4 度范围内。
引用
@article{arxiv.1602.07246,
title = {Development of the Model of Galactic Interstellar Emission for Standard Point-Source Analysis of Fermi Large Area Telescope Data},
author = {F. Acero and M. Ackermann and M. Ajello and A. Albert and L. Baldini and J. Ballet and G. Barbiellini and D. Bastieri and R. Bellazzini and E. Bissaldi and E. D. Bloom and R. Bonino and E. Bottacini and T. J. Brandt and J. Bregeon and P. Bruel and R. Buehler and S. Buson and G. A. Caliandro and R. A. Cameron and M. Caragiulo and P. A. Caraveo and J. M. Casandjian and E. Cavazzuti and C. Cecchi and E. Charles and A. Chekhtman and J. Chiang and G. Chiaro and S. Ciprini and R. Claus and J. Cohen-Tanugi and J. Conrad and A. Cuoco and S. Cutini and F. D'Ammando and A. de Angelis and F. de Palma and R. Desiante and S. W. Digel and L. Di Venere and P. S. Drell and C. Favuzzi and S. J. Fegan and E. C. Ferrara and W. B. Focke and A. Franckowiak and S. Funk and P. Fusco and F. Gargano and D. Gasparrini and N. Giglietto and F. Giordano and M. Giroletti and T. Glanzman and G. Godfrey and I. A. Grenier and S. Guiriec and D. Hadasch and A. K. Harding and K. Hayashi and E. Hays and J. W. Hewitt and A. B. Hill and D. Horan and X. Hou and T. Jogler and G. Jóhannesson and T. Kamae and M. Kuss and D. Landriu and S. Larsson and L. Latronico and J. Li and L. Li and F. Longo and F. Loparco and M. N. Lovellette and P. Lubrano and S. Maldera and D. Malyshev and A. Manfreda and P. Martin and M. Mayer and M. N. Mazziotta and J. E. McEnery and P. F. Michelson and N. Mirabal and T. Mizuno and M. E. Monzani and A. Morselli and E. Nuss and T. Ohsugi and N. Omodei and M. Orienti and E. Orlando and J. F. Ormes and D. Paneque and M. Pesce-Rollins and F. Piron and G. Pivato and S. Rainò and R. Rando and M. Razzano and S. Razzaque and A. Reimer and O. Reimer and Q. Remy and N. Renault and M. Sánchez-Conde and M. Schaal and A. Schulz and C. Sgrò and E. J. Siskind and F. Spada and G. Spandre and P. Spinelli and A. W. Strong and D. J. Suson and H. Tajima and H. Takahashi and J. B. Thayer and D. J. Thompson and L. Tibaldo and M. Tinivella and D. F. Torres and G. Tosti and E. Troja and G. Vianello and M. Werner and K. S. Wood and M. Wood and G. Zaharijas and S. Zimmer},
journal= {arXiv preprint arXiv:1602.07246},
year = {2016}
}
备注
Accepted for publication in ApJS