Limb darkening in spherical stellar atmospheres

Title: Limb darkening in spherical stellar atmospheres
Creator: Lester, J.B.; Nielson, H.R.
Date: 2011
Description: Stellar limb darkening, I(μ = cosθ), is an important constraint for microlensing, eclipsing binary, planetary transit, and interferometric observations, but is generally treated as a parameterized curve, such as a linear-plus-square-root law. Many analyses assume limb-darkening coefficients computed from model stellar atmospheres. However, previous studies, using I(μ) from plane-parallel models, have found that fits to the flux-normalized curves pass through a fixed point, a common μ location on the stellar disk, for all values of Teff, log g and wavelength. Aims. We study this fixed μ-point to determine if it is a property of the model stellar atmospheres or a property of the limb-darkening laws. Furthermore, we use this limb-darkening law as a tool to probe properties of stellar atmospheres for comparison to limb-darkening observations.; Lester, J.B. & Nielson, H.R. (November 2011). Limb darkening in spherical stellar atmospheres. Astronomy and Astrophysics, 530, pp. A65.
Rights: Astronomy and Astrophysics
Online Publication: Link to Journal Article
Source: University of Toronto Mississauga Library