Fermi耀变体红移和gamma射线谱指数特性研究  

Properties of Fermi Blazar for Redshift and Gamma Ray Spectral Index

作　　者：徐云冰[1] 刘文广[1] 易庭丰[1] 

机构地区：[1]云南师范大学物理与电子信息学院,云南昆明650092

出　　处：《云南师范大学学报（自然科学版）》2015年第4期1-4,共4页Journal of Yunnan Normal University:Natural Sciences Edition

基　　金：国家自然科学基金项目资助(11463001);云南省教育厅基金资助项目(2014Y138);云南省高校天体物理创新团队资助项目

摘　　要：收集了368个具有gamma射线数据的高置信度Fermi耀变体(157个FSRQs和211个BL Lac天体),讨论了该样本的红移和gamma射线谱指数的分布特性,结果表明:HBLs的红移和gamma射线谱指数较小,FSRQs的红移和gamma射线谱指数较大,LBLs的红移和gamma射线谱指数都介于两者之间,它们之间可能存在一个从FSRQs经LBLs到HBLs的演化序列,HBLs与FSRQs有明显的不同,LBLs与FSRQs却很相似.In this paper,we collected 368 samples of Fermi blazars（157 FSRQs,211 BL Lac）,analyzed the statistical distributions of redshift and gamma-ray spectral index of the samples,and discussed the relationship between the redshift and the gamma-ray spectral index.The result showed the average redshift and gamma-ray spectral index of HBLs was smaller than those of LBLs and FSRQs,and the average redshift and gamma-ray spectral index of FSRQs was bigger than those LBLs and HBLs,LBLs′redshift and gamma-ray spectral index were in the middle of HBLs and FSRQs.There are an evolutionary sequence of properties from FSRQs through LBLs to HBLs.The HBLs are significantly different from FSRQs,while the LBLs are similar to FSRQs.

关 键 词：Fermi耀变体 红移 gamma射线 谱指数 

分 类 号：P15[天文地球—天文学]