On the association between type II radio bursts and CMEs

Details On the association between type II radio bursts and CMEs On the association between type II radio bursts and CMEs

Mar 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002a%26a...384.1098c&link_type=abstract

Astronomy and Astrophysics, v.384, p.1098-1106 (2002)

Astronomy and Astrophysics

Astrophysics

49

Sun: Radio Radiation, Coronal Mass Ejections (Cmes), Shock Waves

Scientific paper

Ground-based observations of metric (coronal) type II radio bursts are compared with observations of coronal mass ejections (CMEs) obtained by the LASCO coronagraph aboard SOHO and with decametric (interplanetary) type II bursts recorded by the WAVES instrument aboard Wind. The basic data sample comprises 63 metric type II radio bursts observed during different phases of the solar cycle, i.e., 20 events in 1997 and 43 events in 1999/2000. Our analysis is based on temporal coincidence and velocity data derived from height-time plots of CMEs and frequency drift rates of type II radio bursts, respectively. The results suggest that there are three scenarios leading to metric type II burst excitation: The radio emission is generated either at flare-related blast wave shocks (class 1), at shocks driven by the leading edge of the CME (class 2), or at shocks driven by internal parts or the flanks of the CME (class 3). This classification is supported by an analysis of the association with Hα flare sites. The first class of events comprises 19 events (30%), the second 19 events (30%), and the third 18 events (29%). 7 events (11%) were not classified. Furthermore, we notice a possible solar cycle dependence of the relative occurrence of the different scenarios.

Affiliated with

Also associated with

No associations

Rating

On the association between type II radio bursts and CMEs does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with On the association between type II radio bursts and CMEs, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On the association between type II radio bursts and CMEs will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1407278