Numerical calculations of spectral turnover and synchrotron self-absorption in CSS and GPS radio sources

被引:26
作者
Jeyakumar, S. [1 ]
机构
[1] Univ Guanajuato, Dept Astron, AP 144, Guanajuato 36000, Mexico
基金
美国国家航空航天局;
关键词
radiation mechanisms: non-thermal; galaxies: active; radio continuum: galaxies; COMPACT STEEP-SPECTRUM; GHZ-PEAKED-SPECTRUM; BANK VLBI SURVEY; ACTIVE GALACTIC NUCLEI; HIGH-FREQUENCY PEAKERS; DENSE-PLASMA TORUS; SYMMETRIC OBJECTS; RELATIVISTIC JETS; VLA OBSERVATIONS; GALAXY NGC-1052;
D O I
10.1093/mnras/stw181
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The dependence of the turnover frequency on the linear size is presented for a sample of Gigahertz Peaked Spectrum and Compact Steep Spectrum radio sources derived from complete samples. The dependence of the luminosity of the emission at the peak frequency with the linear size and the peak frequency is also presented for the galaxies in the sample. The luminosity of the smaller sources evolve strongly with the linear size. Optical depth effects have been included to the 3D model for the radio source of Kaiser to study the spectral turnover. Using this model, the observed trend can be explained by synchrotron self-absorption. The observed trend in the peak-frequency-linear-size plane is not affected by the luminosity evolution of the sources.
引用
收藏
页码:3786 / 3794
页数:9
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