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Astron. Astrophys. 333, 338-342 (1998)

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Wavelength dependency of the Solar limb darkening

D. Hestroffer 1 and C. Magnan 2, 3

1 Astrophysics Division, Space Science Department of ESA, ESTEC, Postbus 299, 2200 AG Noordwijk, The Netherlands
2 GRAAL, Université de Montpellier II, F-34095 Montpellier Cedex 5, France
3 Collège de France, Paris

Received 19 September 1997 / Accepted 27 October 1997


A single parameter model of the mean Solar limb-darkening is presented. This empirical law has the advantage to represent the limb darkening over a large spectrum at least as well as a quadratic or logarithmic law. Since it is less sensitive than high degree polynomial laws, it is recommended for subsequent analysis of average limb-darkening variations and comparisons.

Key words: limb darkening – center-to-limb variation – Sun: atmosphere

Send offprint requests to: D. Hestroffer (dhestrof@astro.estec.esa.nl)

© European Southern Observatory (ESO) 1998

Online publication: April 15, 1998