Blazar色指数相关研究

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.

Study on the Relationships of Color Indices for Blazar

A large sample including 238 Blazars is selected,there are 118 HBLs,60 LBLs and 60 FSRQs.Some relationships between J-H and H-K,and J-H and J-K,and H-K and J-K are investigated.The main results are as follows. 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 correlationbetween J-H and H-K.For HBLs,there is a clear negative correlation between J-H and H-K.For LBLs,there is a weak positive correlation between J-H and H-K.For FSRQs there 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.