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New limb-darkening coefficients for modeling binary star light curvesWe 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.
Document ID
19950044771
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Van Hamme, W. (Florida International University Miami, FL, United States)
Date Acquired
August 16, 2013
Publication Date
November 1, 1993
Publication Information
Publication: Astronomical Journal
Volume: 106
Issue: 5
ISSN: 0004-6256
Subject Category
ASTROPHYSICS
Distribution Limits
Public
Copyright
Other