The solar corona on 31 July, 1981

Details The solar corona on 31 July, 1981 The solar corona on 31 July, 1981

Mar 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983soph...83..233f&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 83, March 1983, p. 233-242. NSF-Navy-supported research.

Physics

9

Coronagraphs, Coronal Holes, Satellite Observation, Solar Corona, Solar Eclipses, High Altitude, Photomapping, Solar Activity Effects, Solar Cycles, Solar Observatories, Synoptic Measurement

Scientific paper

Results of observations of the solar corona near or at the time of total eclipse, 31 July 1981, are presented. The High Altitude Observatory coronal eclipse camera and the MK-III K-coronameter were employed to record the lower portions of the corona, while the distribution of white light material above 3 solar radii was observed with the Naval Research Laboratory satellite coronagraph on P78-1. The coronal structure is described and the coronal active regions are identified using these data sets. It is found that the polar coronal holes, as developed at this time in the solar cycle, were offset from the poles of rotation and both were seen displaced eastward on the eclipse day. High altitude streamers are found in all three data sets, extending from the base of the corona outward to at least eight solar radii from the center of the sun. In addition, at least two transients were observed on the eclipse day, but it is likely that no transient was in progress during any observation along the eclipse path. A distribution of the white-light corona, derived from synoptic K-coronameter data, is also presented.

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