New absolute spectroscopic measurement of the solar equatorial rotation rate

Details New absolute spectroscopic measurement of the solar equatorial rotation rate New absolute spectroscopic measurement of the solar equatorial rotation rate

Apr 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983soph...84..377s&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 84, April 1983, p. 377-387. Research supported by Max C. Fleischmann Foundation, William an

Physics

6

Absorption Spectra, Equators, Line Spectra, Solar Rotation, Solar Spectra, Stellar Spectrophotometry, Atomic Beams, Potassium, Resonance Scattering

Scientific paper

An atomic-beam resonance-scattering technique applied to the 7699 A solar potassium absorption line is used to make an absolute spectroscopic determination of the solar equatorial rotation rate. This is believed to be a new method which has not previously been used for studying solar rotation. The measurements were made during 1979-82, initially with a permanent apparatus at Oberlin College and more recently with a portable apparatus installed at the Snow Telescope on Mt. Wilson. After carefully allowing for possible systematic errors, it is concluded that the solar sidereal equatorial rotation rate is 13.8 + or - 0.3 deg/day and that it has not varied significantly over the period of these observations.

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