Analysis of the long-term polarization behaviour of BL Lac
Analysis of the long-term polarization behaviour of BL Lac
复制标题
BL Lac 的长期极化行为分析
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
V. Larionov
中科院分区：
文献类型：
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作者：
V. Hagen;E. Larionova;S. Jorstad;C. Bjornsson;V. Larionov
本文分析了彼得堡州立大学天文研究所1969-1991年对BL Lac的偏振和光度观测。偏振方向的分布肯定地指向存在偏振的优选方向（$ heta= 22 degr $），接近VLBI观测到的喷流方向。高偏振度和色度数据是可变源的同步性质的证据。相对斯托克斯参数在某个平均值上呈正态分布。表征中心点源的通量密度和偏振的不同参数之间的相关性允许我们考虑在BL Lac中存在偏振辐射的连续作用源，其上具有随机分布的偏振方向的源被叠加。
An analysis is performed of polarimetric and photometric observations of BL Lac carried out in 1969–1991 at the Astronomical Institute of St. Petersburg State University. The distribution of polarization directions certainly points to the existence of the preferred direction of polarization ($ heta= 22degr$) close to the direction of the jet observed by VLBI. High polarization degree and colorimetric data are evidence of the synchrotron nature of the variable source. The relative Stokes parameters are distributed normally over some mean value. The correlations between different parameters characterizing the flux density and polarization of the central point source allow us to consider that in BL Lac there is a continually acting source of polarized radiation on which the sources with randomly distributed polarization directions are superimposed.