Volume 318, Issue 2 pp. 387-392

Limb-darkening corrections for interferometric uniform disc stellar angular diameters

J. Davis

J. Davis

Chatterton Astronomy Department, School of Physics, University of Sydney, NSW 2006, Australia

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W. J. Tango

W. J. Tango

Chatterton Astronomy Department, School of Physics, University of Sydney, NSW 2006, Australia

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A. J. Booth

A. J. Booth

Chatterton Astronomy Department, School of Physics, University of Sydney, NSW 2006, Australia

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First published: 28 August 2003
Citations: 9

★  E-mail: [email protected]

†  Present address: Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA.

1  The limb-darkening corrections for the Kurucz models are available from the authors. Requests should be sent to [email protected].

Abstract

Stellar angular diameters determined interferometrically are generally established by fitting the observed visibility data with a curve appropriate for a uniformly illuminated disc. The resulting uniform-disc diameters must be corrected for the effects of limb darkening in order to determine the true angular diameters of the stars. An extensive grid of limb-darkening corrections, based directly on the centre-to-limb intensity variations for Kurucz model stellar atmospheres, has been computed without the intermediate step of a parametrized representation of the centre-to-limb variation. The limitations of this method of correction are discussed.

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