Characteristics of coronal mass ejection associated with DH type II radio bursts (All and Limb events)

Details Characteristics of coronal mass ejection associated with DH type II radio bursts (All and Limb events) Characteristics of coronal mass ejection associated with DH type II radio bursts (All and Limb events)

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010ap%26ss.330..237p&link_type=abstract

Astrophysics and Space Science, Volume 330, Issue 2, pp.237-242

Astronomy and Astrophysics

Astrophysics

3

Coronal Mass Ejection, Deca-Hectometric Type Ii Bursts, Solar Flares

Scientific paper

We have studied the characteristics of coronal mass ejections (CMEs) associated with Deca-Hectometric (DH) type II radio bursts (1-14 MHz) in the interplanetary medium during the year 1997-2005. The DH CMEs are divided into two parts: (i) DH CMEs (All) and (ii) DH CMEs (Limb). We found that 65% (177/273) of all events have the speed >900 km s-1 and the remaining 35% (96/273) events have the speed below 900 km s-1. The average speed of all and limb DH CMEs are 1230 and 1288 km s-1, respectively, which is nearly three times the average speed of general population of CMEs (473 km s-1). The average widths of all and limb DH CMEs are 105° and 106°, respectively, which is twice the average width (52°) of the general population of CMEs. We found a better correlation between the speed and width of limb DH CMEs ( R=-0.61) than all DH CMEs ( R=-0.53). Only 28% (177/637) of fast >900 km s-1 general population of CMEs are reported with DH type II bursts counterpart. The above results gives that the relation between the CME properties is better for limb events.

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