费米伽玛射线空间望远镜最初3个月观测Blazar的射电和伽玛射线辐射研究(英文)  

The γ-ray and radio emissions of blazars observed by Fermi Gamma Ray Space Telescope in the first three months

作　　者：聂建军[1] 杨江河[1] 

机构地区：[1]湖南文理学院物理与电子科学学院

出　　处：《湖南文理学院学报（自然科学版）》2011年第3期27-32,共6页Journal of Hunan University of Arts and Science(Science and Technology)

基　　金：湖南省自然科学基金(10JJ3020);湖南省"十一五"重点建设学科--光学基金资助

摘　　要：以费米伽玛射线空间望远镜运行来最初3个月观测的Blazar为样本,给出了74个(46个平谱射电类星体,28个BL Lac天体)伽玛射线噪Blazar天体的射电(5 GHz)和伽玛射线流量,计算了射电到伽玛射线辐射的有效谱指数αRγ.研究了有效谱指数及射电光度与伽玛射线光度的关系.结果表明:对于射电和伽玛射线光度都有一个相同序列,即:FSRQs、RBLs、XBLs,RBLs似乎为FSRQs和RBLs的中间状态.发现射电和伽玛射线光度强线性相关,相关系数r=0.93,或然概率p<0.000 1.表明伽玛射线辐射和射电辐射有很好地关联,伽玛射线辐射应来自同步自康普顿辐射.我们还发现,在αRγ对νLγ图中,能用直线log(νLγ)=46 erg·s-1较好地将FSRQs和BL Lacs分离.In this work,the radio and γ-ray emissions are compiled for a sample of 74 γ-ray loud blazars（46 flat spectrum radio quasars,28 BL Lac objects） to calculate the radio-γ-ray effective spectrum index αRγ.Also the correlations be-tween αRγ and γ-ray luminosity,and radio and γ-ray luminosity are investigated.Results are as follows： For radio and γ-ray luminosity,there is a consequence for FSRQs,RBLs,and XBLs.RBLs seem the bridge connect FSRQs to XBLs.A strong correlation between radio and γ-ray luminosity is found,with a correlation coefficient of r = 0.93,and a chance probability p 0.000 1.It supports that the γ-ray is associated well with the radio emissions,and the γ-ray emissions likely from the SSC process.We also found that FSRQs and BL Lacs can be divided partially at log（νLγ） = 46 erg·s-1 in the plan of radio to γ-ray effective spectrum index vs γ-ray lominosity.

关 键 词：活动星系核 蝎虎天体 类星体 伽玛射线辐射 

分 类 号：P157[天文地球—天文学]