Bibcode
DOI
Claverie, A.; Isaak, G. R.; McLeod, C. P.; van der Raay, H. B.; Roca-Cortés, T.
Referencia bibliográfica
Nature, vol. 293, Oct. 8, 1981, p. 443-445. Research supported by the Science Research Council.
Fecha de publicación:
10
1981
Revista
Número de citas
140
Número de citas referidas
129
Descripción
Evidence for the rapid internal rotation of the sun obtained from
Doppler shift measurements of the Fraunhofer absorption lines is
reported. An improved version of the Doppler shift optical resonance
spectrometer was used to record the resonantly scattered intensities
corresponding to the two wings of the 769.9-nm Fraunhofer absorption
lines of neutral potassium on 28 continuous days in July and August
1980. A total of 33 lines was identified which were found to be split
into components corresponding to the l = 1, l = 2 and l = 0 modes of the
spherical harmonic. Superposed frequency spectra for each mode exhibit a
width indicative of high-Q oscillations, with a mean value of 0.75
microHz. Comparison of this value with that anticipated for the case of
uniform rotation (0.4 microHz) reveals that the core of the sun rotates
two to nine times as rapidly as the surface.