Hierarchical relationship of DH and mDH type II bursts using the kinematic properties of the associated CMEs
Abstract
Using type II radio bursts from WIND WAVES and the associated CMEs from SOHO LASCO, Gopalswamy et al., (2005) found a hierarchical relationship between the wavelength range of the type II bursts and CME kinetic energy. Under 'DH Type II bursts' they had included mDH, DH and DHkm bursts. (DH: Decameter-hectometric; m: metric; km: kilometric). In this work, we consider the pure DH and mDH subsets separately. We find that mDH have slightly larger average speed, larger halo fraction, and larger non-halo width. Despite these consistent relationships, DH CMEs have slightly larger association rate with SEPs than mDH CMEs. The DH CMEs in Gopalswamy et al. (2005) have a higher average speed because they include DH km CMEs, which are more energetic. The SEP association rate of DH and mDH type II bursts are much smaller than that of mkm type II bursts. The SEP sources are generally located in the western hemisphere because of magnetic connectivity requirement.
- Publication:
-
Solar Heliospheric and INterplanetary Environment (SHINE 2015)
- Pub Date:
- July 2015
- Bibcode:
- 2015shin.confE..51T