摘要
活动星系核的γ射线辐射机制仍然是一个待解决的问题,BLLac天体是活动星系核的一类。文中选取了22个BLLac天体,用它们的最大值、最小值和平均值研究了在1GeV处γ射线辐射与射电8.4GHz处辐射之间可能存在的关系。主要结果如下:对于最小值而言,γ射线辐射与射电辐射流量密度之间没有相关性存在;对于最大值和平均值而言,它们的流量密度之间有较好的线性相关性;γ射线辐射与射电辐射谱指数之间也有相关性存在。根据研究结果,我们认为γ射线辐射机制主要是同步自康普顿辐射。
<Abstrcat> The γ-ray emission mechanism is still an open question.BL Lac objects are an extreme subclass of active galactic nuclei.In this paper,we have collected 22 BL Lacertae objects,and investigated the possible correlations between the γ-ray emission (maximum,minimum and average data) at 1 GeV and the radio emission at 8.4GHz.Our results are as follows.For minimum γ-ray data,there is no correlation between the γ-ray and radio flux density;For maximum and average γ-ray data,there are correlations for the 22 BL Lac objects.In addition,there is a correlation between the γ-ray and radio spectral index.According to our analysis,we have proposed that the γ-rays are likely from the synchrotron self-compton process in this case.
出处
《天文研究与技术》
CSCD
北大核心
2005年第2期67-74,共8页
Astronomical Research & Technology
基金
ThisworkissupportedpartiallybytheNational973project(NKBRSFG19990754),theNationalScienceFundforDistinguishedYoungScholars(10125313),andtheFundforTopScholarsofGuangdongProvince(Q02114).
