Abstract


  SHOCK ASSOCIATED PARAMETERS OF MULTIPLE TYPE II BURSTS FROM NEAR SUN TO OUTER CORONA USING EUV, RADIO-BAND SPLITTING, WHITE LIGHT - LASCO-SOD OBSERVATIONS

  E. Ebenezer Chellasamy, Indian Institute of Astrophysics, eben@iiap.res.in
  A. Shanmugaraju, Arulanandar College, Karumathur, Madurai, India,
  K. Suresh, Madurai Kamaraj University, Palkalai Nagar, Madurai, India,

Solar type II radio bursts are produced by plasma oscillations in the solar corona as a result of shock waves caused by coronal mass ejections (CMEs). Sometimes, more than one type II burst is recorded in the dynamic spectrum, and it is believed that its origin may be due to magnetohydrodynamic shock caused by (i) CME's front/flank (ii) CME's frontal portion in the interaction region between CME and streamer. The source regions of these bursts are still debated on since there is no direct simultaneous high-frequency imaging observation. We selected December 31, 2007 event with two type II bursts occurred at 00:54 UT and 01:05 UT to examine these type II bursts and its associated shock preceding CME. We used the coronal data from EUVI onboard SECCHI and LASCO C1/C2 from inner Sun to the outer corona to study its kinematics of these multiple type II burst with coronal and interplanetary shock. We conclude that there is a close temporal, and spatial relationship between first type II burst among the successive type IIs as the shock preceding CME that continues into interplanetary medium.