Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995azh....72..749m&link_type=abstract
Astronomicheskij Zhurnal, vol. 72, p. 749
Astronomy and Astrophysics
Astronomy
9
Solar Corona, Metallicity, Line Spectra, Annual Variations, Brightness Distribution, Solar Magnetic Field, Iron, Polynomials, Solar Cycles
Scientific paper
We reduced a series of the solar-corona observations in the Fe XIV 5303 A line, obtained at the Kislovodsk Station in 1957.5-1991.0. Half-year coronal intensities were least-square-fitted with m-th power polynomials in latitude. Latitude zones with zero second derivative of the coronal intensity were determined. It is shown that these zones appear at latitudes close to 80 deg after the reversal of the polar magnetic field at maxima of the 11-year cycle and then slowly drift toward the equator during the 22-year magnetic cycle at a mean velocity of about 2 m/s. The data obtained are compared with the solar torsional-oscillation pattern obtained from the observed velocity field. Possible causes for the 22-year pole-equator wave in the coronal brightness variations are considered.
Makarov Valentin I.
Tlatov Andrej G.
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