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Radio polarization of BL Lacertae objects

机译:BL Lacertae对象的无线电极化

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摘要

In the present work, using the data base of the University of Michigan Radio Astronomy Observatory (UMRAO) at three radio frequencies (4.8 GHz, 8 GHZ, and 14.5 GHz), we studied the polarization properties for 47 BL Lacertae objects: 38 radio selected BL Lac objects, 7 X-ray selected BL Lac objects, and two inter-middle objects (Mkn 421 and Mkn 501), and found that: (1) the polarizations at higher radio frequency is higher than those at lower frequency, (2) the variability of polarization at higher radio frequency is higher than those at lower frequency, (3) the polarization is correlated with the radio spectral index, (4) the polarization is correlated with the core-dominance parameter for those objects with known core-dominance parameters, suggesting that relativistic beaming could explain the polarization characteristic of BL Lacs.
机译:在当前的工作中,我们使用密歇根大学射电天文台(UMRAO)在三个射频(4.8 GHz,8 GHZ和14.5 GHz)上的数据库,研究了47个BL Lacertae对象的极化特性:选择了38个无线电BL Lac对象,7个X射线选择的BL Lac对象以及两个中间中间对象(Mkn 421和Mkn 501),发现:(1)较高射频下的极化高于较低频率下的极化,(2 )对于已知核的那些物体,(3)极化与无线电频谱指数相关,(4)极化与核占优参数相关。优势参数,表明相对论光束可以解释BL Lacs的极化特征。

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