致密陡谱源1150＋497的VLBI偏振性质  

VLBI Polarization Properties of Compact Steep Spectrum Sources 1150+497

作　　者：齐经武[1,2] 张海燕[1] 南仁东[1] 

机构地区：[1]中国科学院国家天文台,北京100012 [2]中国科学院研究生院,北京100039

出　　处：《天文学报》2009年第1期15-20,共6页Acta Astronomica Sinica

基　　金：国家自然科学基金(10303003)资助

摘　　要：利用美国甚长基线干涉阵对致密陡谱源1150+497进行双波段全偏振观测,获得该源在5GHz和8GHz波段的偏振流量和偏振矢量分布结果,发现该源偏振主要集中在核心处,并通过对三个频率偏振角的拟合,首次获得了源1150+497毫角秒尺度的旋转量约为66 rad/m^2.移去旋转量后,获得该源毫角秒尺度的内禀磁场分布,显示磁场矢量与喷流方向一致.Using the Very Long Baseline Array, the polarization observations for a com- pact steep spectrum source 1150＋497 have been made at two bands. Firstly, the intensity of polarization and distribution of P-vectors have been acquired. The results show that the polarization flux is mostly distributed in the core region. According to the fitting re- sult of polarization angle at three frequencies, the Faraday rotation measure of 66 rad/m2 is achieved for the first time. After removing the Faraday screen, the direction of the intrinsic magnetic field is consistent with the direction of the inner jet.

关 键 词：星系 喷流 射电连续谱 星系 物理数据与过程 偏振 

分 类 号：P157[天文地球—天文学]