用离散相关函数方法分析Blazar天体的γ射线和射电辐射的相关性  

Analysis of the correlation between γ-ray and radio emissions from γ-ray loud Blazar using the discrete correlation function

作　　者：程勇[1] 张雄[1] 伍林[1] 毛慰明[1] 尤莉莎[1] 

机构地区：[1]云南师范大学物理与电子信息学院,昆明650092

出　　处：《物理学报》2006年第2期988-994,共7页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:10363002);教育部科学技术研究重点项目(批准号:02142);云南省自然科学基金(批准号:2004A0027M)资助的课题.~~

摘　　要：收集了119颗有γ射线噪的Blazar天体样品(97个平谱射电类星体和22个BL Lac天体),用离散相关函数(DCF)方法分析了1GeVγ射线辐射流量(最大值、最小值和平均值)与8·4GHz射电辐射流量之间的相关性.获得的主要结果为:在119个Blazar天体和97个平谱射电类星体中,γ射线辐射流量的最大值以及平均值和射电辐射流量之间有相关性;而γ射线辐射流量的最小值和射电辐射流量之间没有相关性.本文结果表明,γ射线和射电辐射都来自喷流,γ射线很可能产生于同步自康普顿(SSC)过程.In this paper, we collect 119 γ-ray-loud Blazar （97 flat spectrum radio quasars （FSRQs） and 22 BL Lacertae objects （BL Lac） ）, and investigate respectively the correlation between the γ-ray emission （maximum, minimum, and average data） at 1GeV and the radio emission at 8.4GHz by discrete correlation function （DCF） method. Our main results are as follows： there is good correlation between the γ-ray in high state and average state and radio emissions for the whole 119 Blazar and 97 FSRQs. And there are no correlation between γ-ray emission and radio emission in low state. Our result shows that the γ-rays are associated with the radio emission from the jet, and that the γ-ray emission is likely to have come from the synchrotron self-Compton model （SSC） process in this case.

关 键 词：BLAZAR Γ射线 射电辐射 流量密度 

分 类 号：P162[天文地球—天文学] P172.3