A multiple type-II burst associated with a coronal transient and its MHD simulation |
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| Authors: | TE Gergely MR Kundu ST Wu M Dryer Z Smith RT Stewart |
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| Institution: | 1. Astronomy Program, University of Maryland, College Park, MD 20742, USA;7. University of Alabama, Huntsville, AL 35899, USA;71. Space Environment Laboratory, NOAA, Boulder, CO 80303, USA;2. Division of Radiophysics, CSIRO, Sydney, Australia |
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| Abstract: | A large coronal transient took place on 8 May 1981. The transient was related to an M7.7/2B flare and was associated with at least two coronal type II bursts. The velocities of the type II bursts were in the range 1100–1800 kms?1, in excess of the transient velocity of 500–1000 kms?1. Two dimensional positions of the type II radio sources are available from both the Clark Lake and the Culgoora Radio Observatories. We carry out two dimensional MHD simulations of the event, taking into account the observed velocity, position, and size of the type II bursts. We simulate the multiple shocks observed during the event and their interaction, and discuss some results of the simulation. |
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