Solar rotation, 1966-1978

Details Solar rotation, 1966-1978 Solar rotation, 1966-1978

Mar 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979soph...61..219l&link_type=abstract

Solar Physics, vol. 61, Mar. 1979, p. 219-231.

Physics

21

Chromosphere, Photosphere, Solar Rotation, Annual Variations, Error Analysis, Line Spectra, Secular Variations, Solar Cycles

Scientific paper

Photospheric and chromospheric spectroscopic Doppler rotation rates for the full solar disk are analyzed for the period July, 1966 to July, 1978. An approximately linear secular increase of the equatorial rate of 3.7% for these 12 years is found (in confirmation of Howard, 1976). The high latitude rates above 65 deg appear to vary with a peak-to-peak amplitude of 8%, or more, phased to the sunspot cycle such that the most rapid rotation occurs at, or following, solar maximum. The chromosphere, as indicated by H-alpha has continued to rotate on the average 3% faster than the photosphere, agreeing with past observations. Sources of error are discussed and evaluated.

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