High-Latitude Solar Rotation Traced by Magnetic Elements

Details High-Latitude Solar Rotation Traced by Magnetic Elements High-Latitude Solar Rotation Traced by Magnetic Elements

May 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999soph..186...13d&link_type=abstract

Solar Physics, v. 186, Issue 1/2, p. 13-23 (1999).

Physics

8

Scientific paper

Sequential observations at Huairou Solar Observation Station, China, and Kitt Peak, U.S.A., show that polar magnetic elements can live from several to more than 58hours. This enables measurement of the solar rotation rate near the polar region by tracing magnetic element motions. With observations carried out on 8-15July 1997, we identify and trace more than 1300elements at north heliographic latitudes between 55 deg-85 deg using two methods, and fit the mean sidereal rotation rate as omega=14.0+/-0.54-(2.24+/-1.22)sin^2theta-(1.78+/-0.79)sin^4theta deg per day.

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