How do stars rotate

Details How do stars rotate How do stars rotate

Aug 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982s%26w....21..299w&link_type=abstract

Sterne und Weltraum, vol. 21, July-Aug. 1982, p. 299-303. In German.

Mathematics

Angular Velocity, Doppler Effect, Stellar Rotation, Stellar Spectra, Sunspots, Convective Flow, Coriolis Effect, Fourier Transformation, Rotating Fluids, Spectrum Analysis

Scientific paper

Theories of stellar rotation are discussed. The discovery of sunspots and their use in determining rotation rates is explained along with use of spectroscopy, in particular the Doppler effect, in determining rates, and the differential rotation of the sun is discussed with some mathematics. The most important theories of differential solar rotation are presented: differential viscosity in the convection zone, interaction of convective cells with rotating gas, and the influence of the Coriolis force. The relationship of stellar rotational velocity to spectral type is shown and explained, and methods of determining stellar rotation are discussed, including relating variations in stellar activity to variations in starspot spectra, and analyzing spectral profiles with Fourier transforms.

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