New solar rotational period, the solar oblateness, and solar faculae

Details New solar rotational period, the solar oblateness, and solar faculae New solar rotational period, the solar oblateness, and solar faculae

Nov 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976phrvl..37.1240d&link_type=abstract

Physical Review Letters, vol. 37, Nov. 1, 1976, p. 1240-1242. NSF-supported research.

Astronomy and Astrophysics

Astronomy

11

Astrometry, Faculae, Oblate Spheroids, Solar Rotation, Axes Of Rotation, Solar Limb, Solar Spectra

Scientific paper

The 'excess' solar oblateness in 1966 and the periodicity in the residuals (most of the variance) can be described as a signal due to an approximately ellipsoidal sun rotating with a 12.2-day period, the major axis being tilted 85 (+ or - 1) deg from the solar axis. This result, independent of physical interpretation, precludes an explanation for the solar oblateness as a 'brightness signal' due to the appearance of facular clusters at the solar limb.

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