Spherically Symmetric Model Stellar Atmospheres and Limb Darkening: II. Limb-Darkening Laws, Gravity-Darkening Coefficients and Angular Diameter Corrections for FGK Dwarf Stars
Document Type
Article
Publication Date
8-9-2013
Description
Limb darkening is a fundamental ingredient for interpreting observations of planetary transits, eclipsing binaries, optical/infrared interferometry and microlensing events. However, this modeling traditionally represents limb darkening by a simple law having one or two coefficients that have been derived from plane-parallel model stellar atmospheres, which has been done by many researchers. More recently, researchers have gone beyond plane-parallel models and considered other geometries. We previously studied the limb-darkening coefficients from spherically symmetric and plane-parallel model stellar atmospheres for cool giant and supergiant stars, and in this investigation we apply the same techniques to FGK dwarf stars. We present limb-darkening coefficients, gravity-darkening coefficients and interferometric angular diameter corrections from Atlas and SAtlas model stellar atmospheres. We find that sphericity is important even for dwarf model atmospheres, leading to significant differences in the predicted coefficients.
Citation Information
Neilson, H. R.; and Lester, J. B.. 2013. Spherically Symmetric Model Stellar Atmospheres and Limb Darkening: II. Limb-Darkening Laws, Gravity-Darkening Coefficients and Angular Diameter Corrections for FGK Dwarf Stars. Astronomy and Astrophysics. Vol.556 https://doi.org/10.1051/0004-6361/201321888 ISSN: 0004-6361