Limb darkening variations

Details Limb darkening variations Limb darkening variations

May 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984siva.work..165b&link_type=abstract

In NASA, Washington Solar Irradiance Variations on Active Region Time Scales p 165-172 (SEE N84-27635 17-92)

Physics

Limb Darkening, Line Spectra, Magnetic Flux, Solar Activity, Solar Limb, Spectrum Analysis, Sun, Faculae, Least Squares Method, Magnetic Signatures, Solar Atmosphere, Standard Deviation, Stellar Luminosity

Scientific paper

Variations of the solar limb darkening as measured in the line wing of the Fe I line at wavelength 5,250 are observed. The measurements are made over the visible solar disk excluding those points where the magnetic field strength exceeded five Gauss. This exclusion of magnetic points should reduce the effects of faculae upon the derived limb darkening curve. The observations cover 160 days and show evidence of variations of 0.002 I(0) over timescales of thirty days.

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