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New limb-darkening coefficients for modeling binary star light curves
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Limb‑darkening coefficients for linear, logarithmic, and square‑root laws are presented to support modeling of binary star light curves with the Wilson–Devinney program. The study proposes using logarithmic or square‑root limb‑darkening laws for binary star light‑curve modeling. The authors compute coefficients from recent ATLAS stellar atmosphere models for solar‑composition stars, evaluate how well linear, logarithmic, and square‑root laws fit the intensity profiles, and provide extensive tables of monochromatic, passband‑specific, and bolometric coefficients for easy comparison. Published in The Astronomical Journal (1993, DOI 10.1086/116788).
view Abstract Citations (1447) References (24) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS New Limb-Darkening Coefficients for Modeling Binary Star Light Curves van Hamme, W. Abstract We present monochromatic, passband-specific, and bolometric limb-darkening coefficients for a linear as well as nonlinear logarithmic and square root limb-darkening laws. These coefficients, including the bolometric ones, are needed when modeling binary star light curves with the latest version of the Wilson-Devinney light curve progam. We base our calculations on the most recent ATLAS stellar atmosphere models for solar chemical composition stars with a wide range of effective temperatures and surface gravitites. We examine how well various limb-darkening approximations represent the variation of the emerging specific intensity across a stellar surface as computed according to the model. For binary star light curve modeling purposes, we propose the use of a logarithmic or a square root law. We design our tables in such a manner that the relative quality of either law with respect to another can be easily compared. Since the computation of bolometric limb-darkening coefficients first requires monochromatic coefficients, we also offer tables of these coefficients (at 1221 wavelength values between 9.09 nm and 160 micrometer) and tables of passband-specific coefficients for commonly used photometric filters. Publication: The Astronomical Journal Pub Date: November 1993 DOI: 10.1086/116788 Bibcode: 1993AJ....106.2096V Keywords: Binary Stars; Coefficients; Light Curve; Limb Darkening; Linear Equations; Nonlinear Equations; Stellar Models; Chemical Composition; Least Squares Method; Stellar Atmospheres; Astrophysics; BINARIES: ECLIPSING full text sources ADS | data products CDS (1)