HAWC 对太阳的首次观测限制稳态 TeV 伽马射线发射
高能天体物理现象
2018-12-26 v2 太阳与恒星天体物理
高能物理 - 唯象学
摘要
在 Fermi-LAT 数据中已探测到来自太阳圆面、至少达 200 GeV 的稳态伽马射线发射，其中最亮、最硬的发射出现在太阳活动极小期。可能的原因是在磁场中由入射转为出射的强子宇宙线与太阳大气碰撞，尽管确切机制尚不清楚。对伽马射线产生机制的一项重要新检验将来自更高能量的观测。只有高海拔水切伦科夫（HAWC）天文台具备在 TeV 能段有效探测太阳所需的灵敏度。利用 2014 年 11 月至 2017 年 12 月（恰在太阳活动极小期之前）的三年 HAWC 数据，我们搜寻来自太阳圆面的 1–100 TeV 伽马射线。未观测到信号证据，并在 1 TeV 处流量为几个 TeV cm s 量级设定了强上限。我们的极限（关于太阳 TeV 伽马射线最严格的限制结果）是基于所有入射宇宙线均产生出射光子的模型所得理论最大流量的 ，而该最大流量又与 Fermi-LAT 在约 100 GeV 附近的数据相当。HAWC 在 2018 年初开始的太阳活动极小期首次探测到太阳 TeV 发射的前景尤其高。
引用
@article{arxiv.1808.05620,
title = {First HAWC Observations of the Sun Constrain Steady TeV Gamma-Ray Emission},
author = {A. Albert and R. Alfaro and C. Alvarez and R. Arceo and J. C. Arteaga-Velázquez 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. Capistràn and A. Carramiñana and S. Casanova and M. Castillo and J. Cotzomi and S. Coutiño de León and C. De León and E. De la Fuente and S. Dichiara and B. L. Dingus and M. A. DuVernois and J. C. Díaz-Vélez and K. Engel and O. Enríquez-Rivera and C. Espinoza and H. Fleischhack and N. Fraija and J. A. García-González and F. Garfias and M. M. González and J. A. Goodman and Z. Hampel-Arias and J. P. Harding and S. Hernandez and B. Hona and F. Hueyotl-Zahuantitla and P. Hüntemeyer and A. Iriarte and A. Jardin-Blicq and V. Joshi and S. Kaufmann and H. León Vargas and G. Luis-Raya and J. Lundeen and R. López-Coto and K. Malone and S. S. Marinelli and O. Martinez and I. Martinez-Castellanos and J. Martínez-Castro and P. Miranda-Romagnoli and E. Moreno and M. Mostafá and A. Nayerhoda and L. Nellen and M. Newbold and M. U. Nisa and R. Noriega-Papaqui and J. Pretz and E. G. Pérez-Pérez and Z. Ren and C. D. Rho and C. Rivière and D. Rosa-González and M. Rosenberg and E. Ruiz-Velasco and H. Salazar and F. Salesa Greus and A. Sandoval and M. Schneider and H. Schoorlemmer and M. Seglar Arroyo and G. Sinnis and A. J. Smith and P. Surajbali and I. Taboada and O. Tibolla and K. Tollefson and I. Torres and L. Villaseñor and T. Weisgarber and S. Westerhoff and I. G. Wisher and J. Wood and T. Yapici and A. Zepeda and H. Zhou and J. D. Álvarez and J. F. Beacom and R. K. Leane and T. Linden and K. C. Y. Ng and A. H. G. Peter and B. Zhou},
journal= {arXiv preprint arXiv:1808.05620},
year = {2018}
}
备注
14 pages, 6 figures. See also companion paper 1808.05624. Accepted for publication in Physical Review D