Dynamical Models of Tailed Radio Sources in Clusters of Galaxies
Dynamical Models of Tailed Radio Sources in Clusters of Galaxies
复制标题
星系团中尾部射电源的动力学模型
DOI：
--
复制
发表时间：
1973
期刊：
影响因子：
--
通讯作者：
G. Perola
中科院分区：
文献类型：
--
作者：
W. Jaffe;G. Perola
建立了两个类似3C129的尾射电源的形成模型。这两个模型都假设，星系尾是活动星系快速运动穿过星系团中相对稠密的气体的结果。第一个模型是对现有的正常对称双射电源模型的修正，考虑了母星系运动和团内气体热压力的影响。第二个模型假设星系有一个长的、永久附着的磁层尾，类似于地磁尾，由星系团内气体流对星系内禀磁场的作用产生。这条尾巴不时地被星系中高能电子的爆发所照亮。尝试将这两个模型拟合到3C 129，看看它们是否能很好地解释这个源的观测特征，并确定团内气体的物理条件。虽然这两个模型都很好地拟合了尾部的形状，但磁层模型更好地拟合了观测到的光谱指数，并且解释了偏振，解决了解释3C 129无线电发射偏振的一些困难。讨论了模型与正常对称双射电源的关系，以及与3C465等中间情况的关系。团内密度和温度的导出值被认为是。（auth）«少
Two medels for the formation of tailed' radio sources like 3C 129 are developed. Both models assume that the tails are the result of the rapid motion of an active galaxy through the relatively dense gas in a cluster of galaxies. The first model is a modification of current models of normal symmetrical double radio sources, with the effects of the motion of the parent galaxy and of the thermal pressure of the intracluster gas included. The second model assumes that the galaxy has a long, permanently attached, magnetospheric tail, similar to the geomagnetic tail, generated by the action of the intracluster gas flow on the intrinsic magnetic field of the galaxy. This tail is illuminated at intervals by outbursts of high energy electrons from the galaxy. An attempt is made to fit both models to 3C 129 to see if they give a good explanation of the observed characteristics of this source, and to determine the physical conditions in the intracluster gas. While both models give good fits to the shape of the tail, the magnetospheric model gives a better fit to the observed spectral indices, more » as well as relbes ia the interpretation of the polarization solving some difficulties in the interpretation of the polarization of the radio emission of 3C 129. The relation of the models to normal symmetric double radio sources, and to intermediate cases like 3C 465 is discussed. The derived values of the intracluster density and temperature are considered. (auth) « less