Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsh41a1628l&link_type=abstract
American Geophysical Union, Fall Meeting 2009, abstract #SH41A-1628
Astronomy and Astrophysics
Astrophysics
[2139] Interplanetary Physics / Interplanetary Shocks, [7513] Solar Physics, Astrophysics, And Astronomy / Coronal Mass Ejections
Scientific paper
We present an analysis of the dynamical evolution of interplanetary coronal mass ejections (ICMEs) and its associated Type II bursts. By using an analytical model developed to explain the ICME dynamics, we compute the speed, position and time of the ICME leading edge, in each point of the interplanetary space between the Sun and Earth. As inputs, the analytical model requires the initial (close to the Sun) and final (at one astronomical unit) ICME speeds, and iteratively computes the best parameters (CME mass and expansion rate, solar wind density, and drag coefficient) to fit both speeds. With this information, and assuming that the source of the type II radio emission is at the nose of the ICME driven shock, we are able to predict the spectral behavior of the ICME-shock associated type II bursts. In this work, we present the model and its application to a set of 15 type II bursts.
Borgazzi Andrea
Lara Alejandro
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