Blazar色指数相关研究  

Study on the Relationships of Color Indices for Blazar

作　　者：杨江河[1] 杨如曙[1] 

机构地区：[1]湖南文理学院物理与电子科学系,湖南常德415000

出　　处：《湘潭大学自然科学学报》2006年第1期46-49,共4页Natural Science Journal of Xiangtan University

基　　金：国家自然科学基金资助项目(10403001);国家杰出青年基金资助项目(10125313);国家973项目(NKBRSFG19990754);湖南省教育厅科研基金资助项目(05C724)

摘　　要：利用一个带有近红外数据的含有238个Blazar的大样本,其中,118个HBLs,60个LBLs,60个FSRQs.研究了色指数J-H、H-K及J-K之间的相互关系,得到了如下结果:在各类样本中J-H和J-K,H-K和J-K之间都有强的线性相关,但J-H和H-K的关系对不同类Blazar有所不同,对于HBLs而言,J-H和J-K之间有明显的负相关;对于LBLs,J-H和H-K之间有较弱的正相关;对于FSRQs,J-H和H-K之间有一个较LBLs更弱的正相关.因此,HBL与LBL和FSRQ有着本质的不同,而LBL和FSRQ却没有明显地区别,预示着HBL、LBL及FSRQ可能有不同的辐射起源.A large sample including 238 Blazars is selected, there are 118 HBLst 60 LBLs and 60 FSRQs. Some relationships between J-H and H - K g and J-H and J-K , and H-K and J-K are investigated. The main results are as lollows. For HBLs, LBLs and FSRQs, there are strong correlations between J-H and J-K , and H-K and J-K . But there are some differences among HBLs, LBLs and FSRQs for the correlation between J-H and H-K. For HBLs, Ihere is a clear negative correlation between J-H and H-K. For LBLs, Ihere is a weak posilive correlation between J-H and H-K. For FSRQs Ihere is more weaker positive correlation between J-H and H-K than that for LBLs. Therefore, HBLs are significantly different from LBLs and FSRQs, but LBLs is not significantly different from FSRQs. This maybe be caused by different origin mechanism for HBLs and LBLs.

关 键 词：BLAZAR JHK 色指数 相关 

分 类 号：P159.5[天文地球—天文学]