Meridional motions of sunspots and sunspot groups

Details Meridional motions of sunspots and sunspot groups Meridional motions of sunspots and sunspot groups

Aug 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...307..389h&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 307, Aug. 1, 1986, p. 389-394.

Astronomy and Astrophysics

Astrophysics

47

Meridional Flow, Solar Activity, Sunspots, Latitude

Scientific paper

Mount Wilson white-light plate data for north-south sunspot motions are studied, taking both sunspot groups and individual spots into consideration. The average results as a function of latitude show a midlatitude northward flow and an amplitude of a few hundredths of a degree per day in each hemisphere. For sunspot groups, a dependence on latitude is seen that tends generally toward more poleward motions at higher latitudes. A previously reported, systematic variation of the latitude dependence of the meridional motion of sunspot groups with phase in the solar cycle is not confirmed.

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