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Session 1 - Chromosphere, Corona, Flares.
Display session, Friday, June 27
Ballroom B, Chair: Charles Kankelborg

[1.46] Multi-Spectral Imaging of Coronal Activity.

F. Bagenal, T. Darnell (University of Colorado), J. Burkepile, A. Hundhausen (HAO/NCAR), D. Alexander (Lockheed)

By combining white light coronameter, Yohkoh soft x-ray and H-alpha images from time intervals that encompass coronal mass ejections (CMEs), we are able to examine the related evolution of structures in the solar atmosphere. For example, what is the role of prominences in pre-CME evolution of the corona; how well does the Pneumann & Kopp model describe post-CME re-formation of coronal loops. On the west limb, Yohkoh data show the structure of the corona before the CME while prominences/filaments are revealed by H-alpha images. On the east limb,the same data show x-ray-emitting loops that brighten and expand after the CME. We have chosen examples of events from 1994 and 1995 that illustrate the use of such composite images. Composite white light, Yohkoh and H-alpha images are also shown for the Whole Sun Month and we discuss the possibilities of adding SOHO data as they become available.

Program listing for Friday