由NVSS证认的射电类星体

通过对２０００年版Ｖｅｒｏｎ类星体星表和ＮＶＳＳ巡天数据进行交叉证认，得到了３０１颗新发现有射电辐射的类星体．计算了射电类星体的射电话指数、射电光度、偏振度等物理量并进行了统计分析，讨论了射电类星体所占比例随红移和绝对星等的分布，以及偏振度随红移的演化关系．结果发现，强射电类星体在所有类星体中所占的比例Ｆ（ＲＬＱ）随着ＭＢ的增加而增大，随红移的演化是从。＝０．０到ｚ＝０．８逐渐上升，在ｚ＝１．５附近开始缓慢下降，到ｚ＝ ２．０附近降到谷底，然后又有上升趋势．射电偏振度大部分小于 ４．０％，偏振度越小，类星体数目越多．而射电偏振度与红移之间似乎没有相关性．

The Radio Quasars Identified from the NVSS Catalogue

We have searched for radio emission of 11,304 quasars from the NVSS catalog and obtained 2626 positive detections, of which 301 are new. We made statistical studies of the radio spectral index, radio luminosity and the variation of the fraction of radio-loud quasars as a function of the absolute B magnitude and redshift. We found that the fraction of radioloud quasars steady increases between MB = -22 and -30. It increases from z ~ 0.0 until z = 0.8, then it goes down at z = 1.5. The degree of polarization shows little dependence on the redshift.