Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978soph...60..143n&link_type=abstract
Solar Physics, vol. 60, Nov. 1978, p. 143-153.
Astronomy and Astrophysics
Astronomy
9
Solar Activity, Solar Corona, Solar X-Rays, Skylab Program, Solar Cycles, Solar Flares, Solar Spectra, Spaceborne Astronomy
Scientific paper
The relationship between coronal hole evolution and solar active regions during the Skylab period is examined. A tendency is found for holes to grow or remain stable when the activity nearby, seen as calcium plages and bright regions in X-rays, is predominantly large, long-lived regions. It is also found that there is a significantly higher number of small, short-lived active regions, as indicated by X-ray bright points, in the vicinity of decaying holes than there is near other holes. This is interpreted to mean that holes disappear at least in part because they become filled with many small scale, magnetically closed, X-ray emitting features. This interpretation, together with the observation that the number of X-ray bright points was much larger near solar minimum than it was during the Skylab period, provides a possible explanation for the disappearance of the large, near-equatorial coronal holes at the time of solar minimum.
Davis Mark J.
Gerassimenko Michel
Golub Leon
Krieger Allen S.
Nolte J. T.
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