Solar oscillations and limb darkening fluctuations

Details Solar oscillations and limb darkening fluctuations Solar oscillations and limb darkening fluctuations

Jul 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a...100l..23y&link_type=abstract

Astronomy and Astrophysics, vol. 100, no. 2, July 1981, p. L23-L25.

Physics

Optics

9

Atmospheric Effects, Atmospheric Optics, Limb Darkening, Solar Limb, Solar Oscillations, Brightness, Power Spectra, Transparence

Scientific paper

Attention is given to the controversy now surrounding observational results concerning solar pulsations. It is pointed out that brightness, diameter and velocity measurements can be spoiled by atmospheric effects. Measurements of the apparent limb darkening profile, with various image quality conditions, obtained by means of high-speed scanning (approximately 3000 arcsec/sec) are presented. The measurements show fluctuations of the maximum brightness gradient with frequencies found by other investigators. It is noted that the results cannot be interpreted as terrestrial atmospheric transparency but rather as a brightness redistribution of the apparent limb darkening.

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