Simulating gamma-ray production from cosmic rays interacting with the solar atmosphere in the presence of coronal magnetic fields

作     者：李哲 吳震宇 陈松战 南云程 何会海 Zhe Li;Kenny C.Y.Ng;Songzhan Chen;Yuncheng Nan;Huihai He

作者机构：Institute of High Energy PhysicsChinese Academy of ScienceBeijing 100049China Department of PhysicsThe Chinese University of Hong KongShatinNew TerritoriesHong KongChina School of Physical SciencesUniversity of Chinese Academy of ScienceBeijing 100049China 

出 版 物：《Chinese Physics C》 (中国物理C（英文版）)

年 卷 期：2024年第48卷第4期

页      面：159-173页

核心收录：

学科分类：07[理学] 070401[理学-天体物理] 0704[理学-天文学] 

基　　金：the NSFC(12261160362,12022502) KCYN is supported by grants provided by the NSFC(12322517,N_CUHK456/22) RGC(24302721,14305822,14308023) 

主　　题：solar gamma-ray corona magnetic field Geant4 simulation hadronic interaction 

摘      要：Cosmic rays can interact with the solar atmosphere and produce a slew of secondary messengers,making the Sun a bright gamma-ray source in the *** observations with Fermi-LAT have shown that these interactions must be strongly affected by solar magnetic fields in order to produce a wide range of observational features,such as a high flux and hard ***,the detailed mechanisms behind these features are still a *** this study,we tackle this problem by performing particle-interaction simulations in the solar atmosphere in the presence of coronal magnetic fields using the potential field source surface(PFSS)*** find that low-energy(~GeV)gamma-ray production is significantly enhanced by the coronal magnetic fields,but the enhancement decreases rapidly with *** enhancement directly correlates with the production of gamma rays with large deviation angles relative to the input cosmic-ray *** conclude that coronal magnetic fields are essential for correctly modeling solar disk gamma rays below 10 GeV,but above that,the effect of coronal magnetic fields *** magnetic field structures are needed to explain the high-energy disk emission.