Blazar的γ射线和低频射电6cm波段辐射关系研究  

Study of the Correlation between γ-ray and Radio Emission in Lower Frequency at 6 cm Band of Blazar

作　　者：杨江河[1] 胡望宇[1] 杨如曙[2] 

机构地区：[1]湖南大学高性能计算中心,湖南长沙410082 [2]湖南文理学院物理与电子科学系,湖南常德415000

出　　处：《湖南大学学报（自然科学版）》2006年第3期132-136,共5页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(10403001);湖南省教育厅科研项目(05C724);湖南文理学院重点科研项目(JJZD06005)

摘　　要：给出了一个带有射电5 GHz和γ射线辐射流量密度的含有94个γ噪Blazar的大样本,其中有66个FSRQs,20个BL Lac天体,利用该样本研究了射电5 GHz和γ射线流量最大值,最小值以及平均值之间的辐射相关.结果表明:γ射线流量最大值和平均值与射电5GHz辐射有较强的相关,最大相关系数r=0.651,置信度均好于10-4;γ射线流量最小值与射电辐射之间没有相关;3C273辐射的最大值不是爆发态时的观测值,若令γ射线谱指数αG=1.0,则3C273的最大辐射流量为(450.8±39.4)×10-8photon.cm-2.s-1.因此,Blazar的γ射线辐射与低频射电辐射确有关联,γ射线的辐射应来自同步加速自康普顿辐射过程.A sample including 94 γ-ray loud Blazars with the data of radio 5 GHz and γ-ray emission was presented. There were 66 FSRQs, 20 BL Lac objects, and 8 un-identification objects. The correlations between radio emission and γ-ray emission for maximum, minimum and average data were investigated. Results showed that there were good correlations between radio emission and γ-ray emission for maximum and average data, where correlation coefficient r = 0. 651, and the chance probability p〈 10^-4; that there was no correlation between radio emission and γ-ray emission for minimum data; and that the object 3C273 was not in its flare state when k was observed. Let γ-ray spectral index αG= 1.0, the flare value of 3C273 was （450.8 ± 39.4）×10^-8 photon.cm^-2.s^-1. Therefore, the γ-ray was associated with the lower frequency radio emission or with the radio emission in the jets, and it was proved that the γ-ray emission was likely from the synchrotron self-compton process.

关 键 词：活动星系核 BLAZAR Γ射线 射电辐射 

分 类 号：P157.7[天文地球—天文学]