The Location of Solar Metric Type II Radio Bursts with Respect to the Associated Coronal Mass Ejections
Abstract
Forty-one solar type II radio bursts located close to the solar limb (projected radial distance r >~ 0.8 R ⊙) were observed at 109 MHz by the radioheliograph at the Gauribidanur observatory near Bangalore during the period 1997-2007. The positions of the bursts were compared with the estimated location of the leading edge (LE) of the associated coronal mass ejections (CMEs) close to the Sun. 38/41 of the type II bursts studied were located either at or above the LE of the associated CME. In the remaining 3/41 cases, the burst was located behind the LE of the associated CME at a distance of <0.5 R ⊙. Our results suggest that nearly all the metric type II bursts are driven by the CMEs.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- June 2012
- DOI:
- 10.1088/0004-637X/752/2/107
- Bibcode:
- 2012ApJ...752..107R
- Keywords:
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- Sun: activity;
- Sun: corona;
- Sun: coronal mass ejections: CMEs;
- Sun: flares;
- Sun: radio radiation;
- solar-terrestrial relations