Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012hell.conf....7p&link_type=abstract
10th Hellenic Astronomical Conference, Proceedings of the conference held at Ioannina, Greece, 5-8 September 2011. Edited by Io
Astronomy and Astrophysics
Astronomy
Scientific paper
The generation mechanism(s) of large-scale propagating intensity fronts seen in the EUV, often called EUV waves, in association with impulsive Coronal Mass Ejection (CMEs) is currently a matter of debate. The strong lateral expansion which some impulsive CMEs undergo during their early phases, when they are observed in the inner corona by EUV imagers, is one possible mechanism for the generation of EUV waves. One impulsive CME - EUV wave pair was observed during 15 February 2011 in quadrature by SDO and STEREO. The source active region was close to disk center as seen by SDO and at the limb as seen by STEREO. This configuration allowed us to determine the kinematics of the EUV wave and of the early EUV CME by AIA/SDO and EUVI/STEREO respectively. The detailed kinematics of the early EUV CME (height and radius evolution of the erupting flux) were then used to constrain a simple model of EUV wave formation, invoking the erupting flux as the wave driver. The ground tracks of the EUV wave as predicted by this data-driven model were then compared with those of the observed wave.
Olmedo Oscar
Patsourakos Spiros
Vourlidas Angelos
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