Astronomy and Astrophysics – Astrophysics – Solar and Stellar Astrophysics
Scientific paper
2011-01-22
Astronomy and Astrophysics
Astrophysics
Solar and Stellar Astrophysics
Scientific paper
We present observations of the formation, propagation and decay of vortex- shaped features in coronal images from the Solar Dynamics Observatory (SDO) associated with an eruption starting at about 2:30UT on Apr 8, 2010. The series of vortices formed along the interface between an erupting (dimming) region and the surrounding corona. They ranged in size from several to ten arcseconds, and traveled along the interface at 6-14 km/s. The features were clearly visible in six out of the seven different EUV wavebands of the Atmospheric Imaging Assembly (AIA). Based on the structure, formation, propagation and decay of these features, we identified these features as the first observations of the Kelvin-Helmholtz (KH) instability in the corona in EUV. The interpretation is supported by linear analysis and by MHD model of KH instability. We conclude that the instability is driven by the velocity shear between the erupting and closed magnetic field of the Coronal Mass Ejection (CME). The shear flow driven instability can play an important role in energy transfer processes in coronal plasma.
Ofman Leon
Thompson Barbara J.
No associations
LandOfFree
SDO/AIA Observation of Kelvin-Helmholtz Instability in the Solar Corona does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with SDO/AIA Observation of Kelvin-Helmholtz Instability in the Solar Corona, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and SDO/AIA Observation of Kelvin-Helmholtz Instability in the Solar Corona will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-642333