Constraining the cosmic ray propagation halo thickness using Fermi-LAT observations of high-latitude clouds

作     者：Yuhua Yao Bing-Qiang Qiao Wei Liu Qiang Yuan Hong-Bo Hu Xiao-Jun Bi Chao-Wen Yang Yi-Qing Guo 姚玉华;乔冰强;刘伟;袁强;胡红波;毕效军;杨朝文;郭义庆

作者机构：College of PhysicsSichuan UniversityChengdu 610064China Key Laboratory of Particle AstrophysicsInstitute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Key Laboratory of Dark Matter and Space AstronomyPurple Mountain ObservatoryChinese Academy of SciencesNanjing 210008China School of Astronomy and Space ScienceUniversity of Science and Technology of ChinaHefei 230026China University of Chinese Academy of SciencesBeijing 100049China 

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

年 卷 期：2021年第45卷第10期

页      面：117-124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：Supported by the National Key R&D Program of China(2018YFA0404202) the National Natural Science Foundation of China(11635011,11875264,11722328,11851305,U1738205,U2031110) 

主　　题：cosmic ray diffusive halo gamma ray emissivity 

摘      要：The diffusive halo is a basic characteristic of cosmic ray(CR)propagation and can advance our understanding of many CR-related phenomena and indirect dark *** method used to derive the halo size often has degeneracy problems and is thus affected by large *** diffuseγrays from high-latitude clouds might shed light on the halo size *** predictions using the spatially dependent propagation(SDP)model have better agreement with the observed CRs than those of the conventional propagation model,in this work,we investigated halo thickness based on the SDP model using Fermi-LATγ-ray observations of high-and intermediatevelocity *** found that to avoid exceeding the relativeγ-ray emissivity in high-latitude clouds,the halo thickness should be in the range of 3.3-9 ***,the spatial morphology ofγ-rays estimated based on the SDP model for different values of the halo thickness are distinctive,which provides us with a tool to determine the halo *** newly developed model can be tested and tuned using multi-wavelength observations in future studies.