Volume 385, Number 2, April II 2002
|Page(s)||671 - 685|
|Section||Planets and planetary systems|
|Published online||15 April 2002|
Discovery of unusual large group delay in microwave millisecond oscillating events
Beijing Astronomical Observatory, National Astromonical Observatories, Beijing 100012, PR China e-mail: email@example.com
2 Ioffe Institute for Physics and Technology, 194021 St.Petersburg, Russia
3 Purple Mountain Observatory, National Astromonical Observatories, Nanjing 210008, PR China e-mail: firstname.lastname@example.org
4 Radiophysical Research Institute, 603950 Nizhny Novgorod, Russia e-mail: email@example.com
Corresponding author: G. D. Fleishman, firstname.lastname@example.org
Accepted: 17 January 2002
Two events demonstrating periodic narrowband millisecond pulsations of radio emission both in intensity and polarization degree are analyzed. Large time delays between L- and R-polarization components are found. The radio emission is shown to be generated as unpolarized by a plasma mechanism at the second harmonic of the upper-hybrid frequency. Observed oscillations of the radiation polarization degree arise due to group delay between extraordinary and ordinary modes along the line of sight. The theoretically predicted dependence of the group delay on frequency (~f-3) agrees excellently with the observed delay frequency dependence. Physical parameters of the emission source and “delay site” are determined within the proposed model.
Key words: Sun: radio radiation / Sun: flares / Sun: general
© ESO, 2002
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.