Properties of space and time distribution of solar coronal holes

Details Properties of space and time distribution of solar coronal holes Properties of space and time distribution of solar coronal holes

Sep 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999soph..188..245i&link_type=abstract

Solar Physics, v. 188, Issue 2, p. 245-258 (1999).

Physics

16

Scientific paper

The space and time distribution properties of solar coronal holes (CH) are investigated. The data of the catalogue UAG-102, supplemented up to 1995, and synoptic Hα-charts of Solar Geophysical Data are used. It was found that both the polar and equatorial CH can be divided into two subclasses. The properties of time classes are discerned. Statistical weights of the recurrent CH are accounted, which allow to determine the character of rotation of the different classes of CH with more accuracy. It was shown that the equatorial CH with long lifetimes possess differential rotation that is similar to sunspot groups, and the long-living polar CH rotate as a rigid body. A conclusion about the existence of two types of large-scale solar magnetic fields is made.

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