HR: 1330h
AN: SP23B-02    [Abstracts]
TI: High Resolution Chromospheric Flow Fields in Solar Active Region NOAA 9393 Before and After an X20 Flare
AU: Smith, G A
EM: gas3@njit.edu
AF: New Jersey Institute of Technology, Center for Solar-Terrestrial Research, 323 Martin Luther King Blvd, Newark, NJ 07102 United States
AU: * Tritschler, A
EM: ali@bbso.njit.edu
AF: Big Bear Solar Observatory, 40386 North Shore Lane, Big Bear City, CA 92314 United States
AU: Denker, C
EM: cdender@adm.njit.edu
AF: New Jersey Institute of Technology, Center for Solar-Terrestrial Research, 323 Martin Luther King Blvd, Newark, NJ 07102 United States
AU: Denker, C
EM: cdender@adm.njit.edu
AF: Big Bear Solar Observatory, 40386 North Shore Lane, Big Bear City, CA 92314 United States
AB: 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).
UR: http://www.bbso.njit.edu
DE: 7500 SOLAR PHYSICS, ASTROPHYSICS, AND ASTRONOMY
DE: 7507 Chromosphere
DE: 7513 Coronal mass ejections
DE: 7519 Flares
DE: 7594 Instruments and techniques
SC: Solar Physics Division - AAS [SP]
MN: 2005 Joint Assembly