Semi-regularities in the photospheric magnetic fields

Details Semi-regularities in the photospheric magnetic fields Semi-regularities in the photospheric magnetic fields

Jun 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986soph..105..257s&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 105, June 1986, p. 257-263.

Physics

2

Magnetic Poles, Periodic Variations, Photosphere, Solar Magnetic Field, Solar Rotation, Angular Velocity, Astronomical Maps, Coronal Holes, Solar Activity

Scientific paper

Using Stanford large-scale magnetic field synoptic charts of rotation 1676 to 1739 and by delineating LLUMR, i.e., long-lived unipolar magnetic regions, of both polarities surviving at least for four solar rotations, the semiregular nature of their photospheric magnetic field pattern and their rotational properties have been examined. The investigation demonstrates the existence of regularities in the background field patterns as shown from the regular patterns of LLUMR rows and streams. This confirms previous results concerning regularities in large-scale photospheric magnetic field patterns. LLUMR streams seen to be arranged in a wave pattern of alternating polarities. Coronal holes and associated sections of photospheric field patterns suffer differential rotation. The rotation rates of the background field patterns which are not associated with the coronal holes are different from those which are.

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