Physics
Scientific paper
Jun 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006soph..236..155w&link_type=abstract
Soar Physics, vol. 236, Issue 1, p.155-166
Physics
7
Scientific paper
On April 21, 2002, a broadband solar radio burst was observed at about 01:00 03:00 UT with the digital spectrometers of National Astronomical Observatories of China (NAOC). Also many fiber bursts superposed on the continuum bursts were detected in the frequency range of 2.6 3.8 GHz during the time interval. After data processing, some parameters of the fibers such as frequency drift rate, duration, bandwidth, and relative bandwidth were determined. The mean value of the frequency drift was in the range of 42.3 87.4 MHz s-1 (negative). A theoretical interpretation for the fibers was presented based upon a model of the velocity of Alfvén solitons. In this model, the source of the fiber emission was considered as the ducting of the solitons within the magnetic-mirror loop. Then the magnetic field strength of the fiber source was estimated to be about 130 ≤ B0 ≤ 270 G. Also a comparison of the magnetic field estimation was made with another model of whistler group velocity.
Wang Shujuan
Zhong Xiaochun
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