Birefringence effect as a tool for astrophysical plasma study.
Group delay between two magnetoionic modes is discovered and spectrally confirmed ( deltat(g) proportional, variantf(-3)) for the first time for quasiperiodic narrow band millisecond solar radio pulsations. Analysis of cross delays and autodelays proves that both X and O modes originate at the same source, so the radiation is weakly polarized originally. This finding allows one to specify the emission mechanism of the pulsations to be a nonlinear plasma mechanism operating at the second harmonics. Physical parameters of the solar corona are determined by the use of the theory of the nonlinear plasma mechanism; they agree well with independent observations of solar millisecond pulsations.
Fleishman
G D
GD
Purple Mountain Observatory, National Astronomical Observatories, Nanjing 210008, People's Republic of China.
Fu
Q J
QJ
Wang
M
M
Huang
G-L
GL
Melnikov
V F
VF