The Visibility Function and Its Effect on the Observed Characteristics of Sunspot Groups. 3. The East-West Asymmetry of the Appearance and Disappearance of Short-Lived Sunspot Groups: Statistical Results and Theoretical Solution Using Minnaert's Diagram

Details The Visibility Function and Its Effect on the Observed Characteristics of Sunspot Groups. 3. The East-West Asymmetry of the Appearance and Disappearance of Short-Lived Sunspot Groups: Statistical Results and Theoretical Solution Using Minnaert's Diagram The Visibility Function and Its Effect on the Observed Characteristics of Sunspot Groups. 3. The East-West Asymmetry of the Appearance and Disappearance of Short-Lived Sunspot Groups: Statistical Results and Theoretical Solution Using Minnaert's Diagram

Nov 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985baicz..36..359k&link_type=abstract

Bulletin of the Astronomical Institute of Czechoslovakia, vol. 36, p.359

Astronomy and Astrophysics

Astronomy

6

Scientific paper

By treating the Greenwich photoheliographic results statistically, it is proved that the dependence of the number of appearances of short-lived sunspot groups on the distance from the central meridian displays, apart from a distinct maximum at the eastern limb of the disk, also a pronounced maximum in the western solar hemisphere; this maximum is located close to the western limb of the solar disk for one-day spot groups and, with increasing lifetime of the groups, its position moves towards the central meridian. As a result of this, the overall E - W asymmetry of the appearance of short-lived sunspot groups is either zero or slightly in favour of the western hemisphere. Analogous properties are also displayed by the E - W asymmetry of the disappearance of short-lived groups.

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