Astronomy and Astrophysics – Astrophysics
Scientific paper
May 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agusmsp23b..02s&link_type=abstract
American Geophysical Union, Spring Meeting 2005, abstract #SP23B-02
Astronomy and Astrophysics
Astrophysics
7500 Solar Physics, Astrophysics, And Astronomy, 7507 Chromosphere, 7513 Coronal Mass Ejections, 7519 Flares, 7594 Instruments And Techniques
Scientific paper
Hα full-disk images of the Sun obtained at the Big Bear Solar Observatory (BBSO) are used to measure the chromospheric flow field before and after the X20 flare in solar active region NOAA 9393 on April 2, 2001. Local correlation tracking is used to determine global (differential rotation) and local flow fields (flows in active regions and filaments). We present high-resolution (2k × 2k pixel) flow maps to analyze the dynamics of the chromosphere before and after the flare. If there is a typical pattern in the motions of a flaring active region, it can be used to predict flare activity and/or the onset of Coronal Mass Ejections (CMEs). The high quality of the limb-darkening corrected and contrast-enhanced Hα full-disk images make them an ideal data set for these types of studies due to their high-temporal resolution (1-minute cadence) and extended coverage (more than 500 filtergrams).
Denker Carsten
Smith Alex. G.
Tritschler Alexandra
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