Tracking of Interplanetary CME/Shocks evolution using Type II radio burst observations

Details Tracking of Interplanetary CME/Shocks evolution using Type II radio burst observations Tracking of Interplanetary CME/Shocks evolution using Type II radio burst observations

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsh23b1851a&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #SH23B-1851

Astronomy and Astrophysics

Astrophysics

[7513] Solar Physics, Astrophysics, And Astronomy / Coronal Mass Ejections, [7534] Solar Physics, Astrophysics, And Astronomy / Radio Emissions

Scientific paper

The aim of this work is to apply a new analysis technique, using Type II radio observations in the kilometric (km) domain obtained by the Thermal Noise Receiver (TNR) of the WIND/WAVES experiment, to infer the speed evolution of interplanetary (IP) CME/shocks. These CME/Shocks propagating in the IP medium can generate km Type II radio emissions that occur at the fundamental and/or harmonic of the plasma frequency, so these radio emissions provide a means of remotely tracking CME/shocks. We combine our results with previously reported speeds from coronagraph white light and interplanetary scintillation observations, and in-situ measurements, to study the temporal speed evolution of these events. The shock speed values obtained by our analysis technique are in a reasonable agreement with the speed measurements inferred by other techniques at different heliocentric distance ranges. The combination of all the speed measurements show a gradual deceleration of the CME/shocks as they propagate to 1 AU.

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