The differential rotation of the Red Solar Corona (Fe X 6374 Å) from 1957-1994

Details The differential rotation of the Red Solar Corona (Fe X 6374 Å) from 1957-1994 The differential rotation of the Red Solar Corona (Fe X 6374 Å) from 1957-1994

Jul 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997arep...41..548t&link_type=abstract

Astronomy Reports, Volume 41, Issue 4, July 1997, pp.548-551

Astronomy and Astrophysics

Astronomy

4

Scientific paper

A series of observations of the intensity of the solar corona in the Fe X 6374 Angstrom line is analyzed. The series primarily includes data from the Kislovodsk Station, supplemented with data from the Sacramento Peak and Pic du Midi observatories. The dependence of the differential rotation velocity on the phase of the solar-activity cycle is confirmed: at the cycle minimum, the rotational velocity of the equatorial regions is maximum and the latitude dependence of the differential rotation velocity increases. A latitude-time diagram of zones with slow and fast differential rotation is constructed, on which waves of deviation of the differential rotation velocity from the mean values can be traced; the waves travel from the poles to the equator. In 1965-1995, the mean values of the coefficients a_0 , a_1 , and a_2 in the expansion w = a_0_a_1cos^2(theta) + a_2cos^4(theta) grow from cycle to cycle.

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