On the wavelength dependency of solar limb darkening (??303 to 1099 nm)

Abstract

The limb-darkening data published by Neckel and Labs (1994) (5th-order polynomials P 5(μ), μ = cos θ) are used to represent the limb darkening by the functions L n(μ), proposed first by Kourganoff (1949a). When plotted against wavelength, the coefficients of these functions show a rather low scatter and appear to be linear functions of either λ −1 or λ #x2212;5.