Coronal hole evolution by sudden large scale changes

Details Coronal hole evolution by sudden large scale changes Coronal hole evolution by sudden large scale changes

Jan 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978soph...56..153n&link_type=abstract

Solar Physics, vol. 56, Jan. 1978, p. 153-159.

Physics

8

Solar Corona, Solar Magnetic Field, Lines Of Force, X Ray Telescopes

Scientific paper

Sudden shifts in coronal-hole boundaries observed by the S-054 X-ray telescope on Skylab between May and November, 1973, within 1 day of CMP of the holes, at latitudes not exceeding 40 deg, are compared with the long-term evolution of coronal-hole area. It is found that large-scale shifts in boundary locations can account for most if not all of the evolution of coronal holes. The temporal and spatial scales of these large-scale changes imply that they are the results of a physical process occurring in the corona. It is concluded that coronal holes evolve by magnetic-field lines' opening when the holes are growing, and by fields' closing as the holes shrink.

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