Brightness temperature for 166 radio sources

被引：0
|
作者：
Jun-Hui Fan1
机构：
来源：
Research in Astronomy and Astrophysics | 2009年 / 9卷 / 07期
基金：
美国国家科学基金会; 中国国家自然科学基金;
关键词：
galaxies: active — BL Lacertae objects: general — galaxies: jets;
D O I：
暂无
中图分类号：
P142 [理论天体物理学];
学科分类号：
070401 ;
摘要：
Using the database of the University of Michigan Radio Astronomy Observatory (UMRAO) at three radio frequencies (4.8,8 and 14.5GHz),we determined the short-term variability timescales for 166 radio sources. The timescales are 0.15d (2007+777) to 176.17d (0528–250) with an average timescale of △tobs = 17.1 ± 16.5d for the whole sample. The timescales are used to calculate the brightness temperatures, TB. The value of log TB is in the range of log TB = 10.47 to 19.06K. In addition,we also estimated the boosting factor for the sources. The correlation between the polarization and the Doppler factor is also discussed.
引用
收藏
页码：751 / 760
页数：10
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