Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010apj...718..494a&link_type=abstract
The Astrophysical Journal, Volume 718, Issue 1, pp. 494-501 (2010).
Astronomy and Astrophysics
Astronomy
15
Sun: Activity, Sun: Corona, Sun: Coronal Mass Ejections: Cmes, Sun: Uv Radiation, Sun: X-Rays, Gamma Rays
Scientific paper
A new analysis of the 2007 May 19 coronal wave-coronal mass ejection-dimmings event is offered employing base difference extreme-ultraviolet (EUV) images. Previous work analyzing the coronal wave associated with this event concluded strongly in favor of purely an MHD wave interpretation for the expanding bright front. This conclusion was based to a significant extent on the identification of multiple reflections of the coronal wave front. The analysis presented here shows that the previously identified "reflections" are actually optical illusions and result from a misinterpretation of the running difference EUV data. The results of this new multiwavelength analysis indicate that two coronal wave fronts actually developed during the eruption. This new analysis has implications for our understanding of diffuse coronal waves and questions the validity of the analysis and conclusions reached in previous studies.
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