Brightness Temperature Constraints to Compact Synchrotron Source Radiation Obtained from IDV and VLBI Observations

Publications of the Astronomical Society of Australia

K. I. Kellermann¹ 

关键词: galaxies: active;    quasars: general;    galaxies: jets;    radiation mechanisms: non-thermal;   

DOI  :  10.1071/AS01103

学科分类：天文学(综合)

来源: CSIRO

【 摘 要 】

We discuss the observational and theoretical constraints on the brightness temperature of compact opaque synchrotron sources. We consider the implication of observed apparent velocities on the amount of Doppler boosting and compare this with values deduced from directly measured brightness temperatures from ground and space based VLBI observations, as well as the implications of intraday variability. We also discuss the maximum rest frame brightness temperature expected under conditions of both inverse Compton cooling and equipartition conditions.

【 授权许可】

Unknown