Redshift Dependence of the Low-energy Spectral Index of Gamma-Ray Bursts Revisited

作     者：Xiao-Li Zhang Yong-Feng Huang Ze-Cheng Zou Xiao-Li Zhang;Yong-Feng Huang;Ze-Cheng Zou

作者机构：Department of PhysicsNanjing UniversityNanjing 210023China School of Astronomy and Space ScienceNanjing UniversityNanjing 210023China Key Laboratory of Modern Astronomy and Astrophysics(Nanjing University)Ministry of EducationNanjing 210023China Xinjiang Astronomical ObservatoryChinese Academy of SciencesUrumqi 830011China 

出 版 物：《Research in Astronomy and Astrophysics》 (天文和天体物理学研究（英文版）)

年 卷 期：2023年第23卷第12期

页      面：57-62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 Natural Science Foundation of China(grant Nos.12233002,12041306,12147103,U1938201) by the National SKA Program of China(No.2020SKA0120300) by the National Key R&D Program of China(2021YFA0718500) by the Youth Innovations and Talents Project of Shandong Provincial Colleges and Universities(grant No.201909118) 

主　　题：(stars:)gamma-ray burst general-methods statistical-catalogs 

摘      要：A negative correlation was found to exist between the low-energy spectral index and the redshift of gamma-ray bursts(GRBs)by Amati et *** was later confirmed by Geng&Huang and Gruber et al.,but the correlation was also found to be quite dispersive when the sample size was significantly *** this study,we have established two even larger samples of GRBs to further examine the *** of our samples consists of316 GRBs detected by the Swift satellite,and the other one consists of 80 GRBs detected by the Fermi *** is found that there is no correlation between the two parameters for the Swift sample,but there does exist a weak negative correlation for the Fermi *** correlation becomes even more significant when the spectral index at the peak flux is *** is argued that the absence of the correlation in the Swift sample may be due to the fact that Swift has a very narrow energy response so that it could not measure the low-energy spectral index accurately *** studies based on even larger GRB samples are solicited.