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Modeling and prediction of fast CME/shocks associated with type II bursts

Published online by Cambridge University Press:  01 September 2008

H. Xie
Affiliation:
Catholic University of America, Washington DC, 20064, USA email: hong.xie@nasa.gov NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA
N. Gopalswamy
Affiliation:
NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA
O. C. St. Cyr
Affiliation:
NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA
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Abstract

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A numerical simulation with ENLIL+Cone model was carried out to study the propagation of the shock driven by the 2005 May 13 CME. We then conducted a statistical analysis on a subset of similar events, where a decameter-hectometric (DH) type II radio burst and a counterpart kilometric type II have been observed to be associated with each CME (DHkm CME). The simulation results show that fast CME-driven shocks experienced a rapid deceleration as they propagated through the corona and then kept a nearly constant speed traveling out into the heliosphere. Two improved methods are proposed to predict the fast CME-driven shock arrival time, which give the prediction errors of 3.43 and 6.83 hrs, respectively.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2009

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