Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983soph...83..103m&link_type=abstract
Solar Physics, vol. 83, Feb. 1983, p. 103-114.
Astronomy and Astrophysics
Astronomy
8
Coronal Holes, Solar Corona, Solar Electrons, Solar Prominences, Astronomical Photometry, Electron Density (Concentration), Skylab Program, Solar Magnetic Field, Spaceborne Astronomy
Scientific paper
Observations of the outer solar corona obtained by the High Altitude Observatory's coronagraph aboard Skylab reveal the presence of dark, ray-like structures in the corona. A systematic identification of these voids, which exist for periods of about 24 hr, is presented and their existence as a coronal phenomenon verified. Photometric analysis indicates that these features represent reductions in the coronal radiance of the order of 5%. The authors estimate that the electron density in the voids is comparable to, or less than, that in coronal holes at similar heights. Projection of the phenomena onto synoptic surface maps indicates a close relationship with filaments and neutral lines; a potentially significant temporal correlation between the void formation and that of the underlying prominence is noted.
MacQueen Robert M.
Picat Jean-Pierre
Sime D. G.
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