Initial observations with the SOLWIND coronagraph

Details Initial observations with the SOLWIND coronagraph Initial observations with the SOLWIND coronagraph

May 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...237l..99s&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 237, May 1, 1980, p. L99-L101. Navy-supported research.

Physics

40

Coronagraphs, Solar Activity Effects, Solar Corona, Solar Physics, Solar Wind, Polar Regions, Satellite Observation, Skylab Program, Solar Cycles, Solar Observatories, Sunspots

Scientific paper

The NRL Solwind coronagraph has provided the first systematic, temporally (10 minute intervals) resolved view of the outer solar corona near the peak of a sunspot cycle. It observes a 2.6-10.0 solar radii annular field of view with a spatial resolution of 1.25 arc min, and the Solwind observations allow the study of the evolution of streamers at high latitude for the first time. It is noted that most coronal structures changed significantly from day to day, which changes were associated with the ejection of material outward across the coronagraph's field of view. Attention is given to a transient which was observed to have a well-defined curved front which advanced outward across the field of view at an essentially constant speed of 500 km/s, but unlike most Skylab loop-type mass ejections, left no remnants 24 hours later.

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