Group Doppler effect in anisotropic plasmas |
| |
Authors: | P L Leung P C W Fung |
| |
Institution: | (1) Physics Department, University of Hong Kong, Hong Kong;(2) Physics Department, Hong Kong Baptist College, Hong Kong |
| |
Abstract: | In anisotropic plasmas, the radiative power emitted and the power observed per unit solid angle should be calculated along the direction of the group velocityv
g
. The two power functions referred differ by a product of two factors: one is the group Doppler factor and the other is the squeezing effect of the radiative energy due to the dependence ofv
g
on direction. In this paper, the group Doppler factor is derived using two different methods, and the relevant physical concepts are analyzed in details. A number of numerical examples pertaining to astrophysical situations are presented, to illustrate the significance of the group Doppler effect with respect to the wave Doppler effect which is valid in isotropic media. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|