Multi-spectral Studies of a Coronal Channel

Lead Investigator: Brian Handy, handy@sag.space.lockheed.com
Dept. of Physics, Montana State University

Collaborators: J. R. Lemen, T. D. Tarbell, A. M. Title

Active Regions NOAA #7978 and its subsequent appearance as #7986 on the next solar rotation drew a great deal of attention when it appeared during July 1996. It was an old-cycle, low-latitude, solar-minimum region, which produced an GOES class X-ray flare. Over a period of hours the solar X-ray flux as measured by GOES changed by over five orders of magnitude. During the course of the active region evolution, a large coronal hole channel developed that stretched from the north polar hole down to near the active region. The uniqueness and size of this active region provides a good opportunity to study the effect that active region evolution has on the development of a nearby coronal hole. In particular, we will study the morphological development of the coronal hole boundaries and compare it to development of the active region using data acquired with the EIT on SOHO and the SXT on Yohkoh. We compare these developments with magnetograms that have been obtained with MDI on SOHO.

For this project we would like to have access to full-disk magnetograms for several days near the time of passage of this AR in July, August and (coming) September.


No additional text was submitted for this proposal.