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Recent data and theory for type II solar radio bursts are reviewed, focusing on a recent analytic quantitative theory for
interplanetary type II bursts. The theory addresses electron reflection and acceleration at the type II shock, formation of
electron beams in the foreshock, and generation of Langmuir waves and the type II radiation there. The theory's predictions
as functions of the shock and plasma parameters are summarized and discussed in terms of space weather events. The theory
is consistent with available data, has explanations for radio-loud/quiet coronal mass ejections (CMEs) and why type IIs are
bursty, and can account for empirical correlations between type IIs, CMEs, and interplanetary disturbances.
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献
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