Observations of Coronal Bright Fronts using SDO/AIA

Details Observations of Coronal Bright Fronts using SDO/AIA Observations of Coronal Bright Fronts using SDO/AIA

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsh23a1825l&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #SH23A-1825

Astronomy and Astrophysics

Astrophysics

[7509] Solar Physics, Astrophysics, And Astronomy / Corona

Scientific paper

Coronal bright fronts (CBFs; commonly called ``EIT waves'') have been studied in detail for over ten years but remain a source of much debate. We present the first observations of a CBF using the Atmospheric Imaging Assembly (AIA) onboard the Solar Dynamic Observatory (SDO). An intensity profiling technique is used to automatically identify the position of the CBF. The resulting kinematics of the pulse are studied in detail, with the CBF exhibiting clear deceleration with propagation. The multi-wavelength capabilities of SDO/AIA are also used to examine the CBF across multiple passbands. The CBF is evident in both the 193 and 211~Å passbands, with the 171~Å passband showing no clear CBF signal in contrast to previous observations from other space-based instruments. Comparing these results with similar observations from STEREO/EUVI, we suggest that CBFs may best be approximated as freely-propagating magneto-acoustic waves.

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