On the measurement of solar rotation using high-degree p-mode oscillations

Details On the measurement of solar rotation using high-degree p-mode oscillations On the measurement of solar rotation using high-degree p-mode oscillations

Dec 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988esasp.286...67w&link_type=abstract

In ESA, Seismology of the Sun and Sun-Like Stars p 67-71 (SEE N89-25819 19-92)

Physics

1

P Waves, Solar Oscillations, Solar Rotation, Angular Velocity, Helioseismology, Solar Activity Effects

Scientific paper

Progress in measuring the solar rotation rate with p-modes of degree 100 to 400, using a set of high-resolution solar images taken at Big Bear Solar Observatory is discussed. The main conclusion drawn from an analysis of 1 day of data is that the equatorial angular velocity is essentially equal to the observed surface rate over the radius range 0.87 is less than or = r/R is less than or = 0.99 to within a few percent. Because of likely systematic errors at the 1 percent level these data do not allow a distinction between a surface rotation rate equal to that measured using magnetic tracers and that based on the Doppler shift of photospheric spectral lines.

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