XBLs和平谱射电类星体间光度与宽波段谱指数的相关性分析

The correlation between broad-band spectral index and luminosity for XBLs and FSRQs

对Fossati等人所给出的Blazar样本分别计算从射电到X射线波段的光度和宽波段光谱指数,在此基础上研究了XBLs和FSRQs间的光度与宽波段谱指数的相关性质.结果表明:对XBLs和FSRQs而言可以由射电光度logLr≈43.5分布在两个不同的区域,在XBLs和FSRQs之间光度与宽波段谱指数之间的相关性要普遍强于XBLs和RBLs之间光度与宽波段谱指数之间的相关性,XBLs和FSRQs位于不同的区域,可以通过rαx=0.75较好地区分开来,这意味着它们之间的能谱分布形状是有差异的,因而有助于了解其内部辐射机制,最后对结果进行讨论.

Using the sample of XBLs and RBLs presented by Fossati et al, we calculated the broad-band spectral index and luminosity from radio to X-ray of each source respectively. We also made a statistical analysis between broad-band spectral index and luminosity for XBLs and FSRQs. The main results are as follows： XBLs and FSRQs can be separated by the value αrx=0.75 and logLr≈43.5. The correlations between broad-band spectral index and luminosity between XBLs and FSRQs are larger than that between XBLs and RBLs. It is helpful for us to understand the radiation mechanism for these different kinds of blazars.