BL Lac天体的γ射线和射电辐射的统计特性

给出了一个带有射电5.0GHz，8.4GHz 和γ射线辐射流量密度的22个γ噪BL Lac天体的样本，研究了它们在1GeV处的γ射线辐射流量密度最大值、平均值及最小值与射电5.0GHz，8.4GHz辐射流量之间的可能关系.结果表明：1）射电5.0GHz，8.4GHz辐射与γ射线辐射在低态时没有相关，但在高态和平均态时都存在较强的相关，最大相关系数r=0.85，置信度均好于10^-4；2）γ射线谱指数和射电谱指数之间也有一个弱相关关系存在.因此，认为γ射线的辐射主要是同步自康普顿辐射.关键词：BL Lac天体γ射线射电辐射谱指数

Statistical characteristics of gamma ray and radio emission of BL Lac object

A sample including 22 BL Lac objects was collected. The possible correlations between the γ-ray emission at 1 GeV and the radio emission at 8.4GHz or 5.0GHz were investigated. Main results are as follows: 1） for minimum γ-ray data, there is no correlation between γ-ray and radio flux density. For maximum and average data, there are good correlations between γ-ray and radio emissions, with the maximum correlation coefficient reaching 0.85, and the chance probability p<10^-4; 2） there are weak correlations between γ-ray spectral index and the radio spectral index. Therefore, the γ-ray radiation was the SSC process.