利用 HAWC 对 M31 伽马射线发射的约束
高能天体物理现象
2020-04-10 v3
摘要
宇宙射线与恒星辐射和磁场一起，已知构成了银河系等星系能量密度的重要部分。当宇宙射线在星际介质中相互作用时，会产生伽马射线发射，这为宇宙射线的传播方式提供了重要指示。位于 785 kpc 之外的仙女座星系（M31）的伽马射线，为研究结构与演化与银河系极为相似的星系中的宇宙射线加速与扩散提供了独特机会。利用高空水切伦科夫天文台（HAWC）33 个月的数据，我们搜寻来自 M31 星系平面的 TeV 伽马射线。我们还通过搜寻星系核上方与下方的费米气泡状结构，调查 M31 中过去与现在的星系活动证据。未观测到显著的伽马射线发射，因此我们利用这一零结果计算了 M31 中能量大于 10 TeV 的宇宙射线能量密度的上限。所计算的上限约比由 Fermi LAT 结果外推得到的预期值高十倍。
引用
@article{arxiv.2001.04065,
title = {Constraints on the Emission of Gamma Rays from M31 with HAWC},
author = {HAWC Collaboration and A. Albert and R. Alfaro and C. Alvarez and J. C. Arteaga-Velázquez and K. P. Arunbabu and D. Avila Rojas and H. A. Ayala Solares and E. Belmont-Moreno and S. Y. BenZvi and C. Brisbois and K. S. Caballero-Mora and T. Capistrán and A. Carramiñana and S. Casanova and U. Cotti and J. Cotzomi and S. Coutiño de León and E. De la Fuente and C. de León and S. Dichiara and B. L. Dingus and M. A. DuVernois and K. Engel and C. Espinoza and H. Fleischhack and N. Fraija and A. Galván-Gámez and D. García-Aguilar and J. A. García-González and F. Garfias and M. M. González and J. A. Goodman and J. P. Harding and S. Hernandez and B. Hona and D. Huang and F. Hueyotl-Zahuantitla and P. Hüntemeyer and A. Iriarte and A. Jardin-Blicq and V. Joshi and D. Kieda and W. H. Lee and H. León Vargas and A. L. Longinotti and G. Luis-Raya and K. Malone and S. S. Marinelli and O. Martinez and I. Martinez-Castellanos and J. Martínez-Castro and J. A. Matthews and P. Miranda-Romagnoli and J. A. Morales-Soto and E. Moreno and M. Mostafá and A. Nayerhoda and L. Nellen and M. Newbold and R. Noriega-Papaqui and A. Peisker and E. G. Pérez-Pérez and Z. Ren and C. D. Rho and D. Rosa-González and M. Rosenberg and R. Rubenzahl and H. Salazar and F. Salesa Greus and A. Sandoval and M. Schneider and G. Sinnis and A. J. Smith and R. W. Springer and P. Surajbali and E. Tabachnick and O. Tibolla and K. Tollefson and I. Torres and L. Villaseñor and J. Wood and T. Yapici and A. Zepeda and H. Zhou},
journal= {arXiv preprint arXiv:2001.04065},
year = {2020}
}
备注
Accepted for publication in ApJ