Statistics – Computation
Scientific paper
Mar 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987soph..110..139n&link_type=abstract
Solar Physics (ISSN 0038-0938), vol. 110, no. 1, 1987, p. 139-170.
Statistics
Computation
15
Diurnal Variations, Solar Activity, Solar Cycles, Solar Limb, Solar Oscillations, Solar Spectra, Computational Astrophysics, Drift, Solar Granulation
Scientific paper
Unexpected asymmetries and variations, which showed up in the first, preliminary reductions of new limb-darkening observations made in June 1986, near the present minimum of solar activity, stimulated a re-analysis of the limb-darkening observations made in April 1981 at Kitt Peak (Neckel and Labs, 1984). The results seem to indicate rather definitely that the intensity distribution across the disk varies at all observed wavelengths between 3300 and 6600 Å with amplitudes in the order of 1 - 2% and time-scales from minutes to hours. Asymmetries in the intensity distribution with respect to the disk center are a frequent phenomenon. There can be no doubt, that also the absolute disk center intensity undergoes variations with comparable size and modulation. Examples for widely differing limb darkening curves are given.
Labs Dietrich
Neckel Heinz
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