Other
Scientific paper
Jun 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006spd....37.2501g&link_type=abstract
American Astronomical Society, SPD meeting #37, #25.01; Bulletin of the American Astronomical Society, Vol. 38, p.251
Other
1
Scientific paper
The kinetic energy of coronal mass ejections (CMEs) has been shown to essentially decide the wavelength range over which type II radio emission occurs. The larger the kinetic energy the wider is the wavelength range over which emission takes place. In other words, CMEs with larger kinetic energy drive shocks farther into the interplanetary medium. We studied a set of about 70 type II bursts that had emission components in the three well-known wavelength domains: metric (m), decameter-hectometric (DH), and kilometric (km). We find that the properties of CMEs associated with the m-to-km type II bursts are nearly identical to those CMEs associated with solar energetic particle events. We suggest that this correlation is evidence for the same shock accelerating electrons and ions. Next we examined the time delay between the onsets of metric and interplanetary type II emission. This is an important parameter because only when a metric type II burst has IP counterpart, it is likely to have space weather consequences. We find that the typical delay is about 1 hour. This is sufficiently small that one can use the DH type II bursts to identify shocks that might impact various destinations in the inner heliosphere.
Gopalswamy Nat
Kaiser Michael L.
Yashiro Seiji
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