Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30wssc2v&link_type=abstract
Geophysical Research Letters, Volume 30, Issue 23, pp. SSC 2-1, CiteID 2181, DOI 10.1029/2003GL018100
Astronomy and Astrophysics
Astrophysics
7
Solar Physics, Astrophysics, And Astronomy: Coronal Mass Ejections, And Astronomy: Flares, And Astronomy: Magnetic Fields
Scientific paper
We find an empirical relationship between the initial speed of Coronal Mass Ejection (CME) and the potential magnetic field energy of the associated active region (AR) that closely resembles the Sedov relation between the speed of a blast wave and the blast energy. We conclude that it is the magnetic energy of an AR that drives the CME. The restructuring of the AR field lines in the corona which can push material with Alfven speed and thus inject energy into the plasma on a time scale shorter than the dynamical time of the corona, is a likely process that can drive the CME. The empirical relationship allows the prediction of the maximum speed of a CME that can result from an AR of a given magnetic energy.
Ravindra B.
Venkatakrishnan Parameshwaran
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