Computing Limb‐darkening Coefficients from Stellar Atmosphere Models

We explore the sensitivity of limb darkening coefficients computed fromstellar atmosphere models to different least-squares fitting methods. Wedemonstrate that conventional methods are strongly biased to fitting thestellar limb. Our suggested method of fitting by minimizing the radiallyintegrated squared residual yields improved fits with better flux conservation.The differences of the obtained coefficients from commonly used values areobservationally significant. We show that the new values are in betteragreement with solar limb darkening measurements as well as with coefficientsreported from analyses of eclipsing binary light curves.Comment: 22 pages, 6 figures; accepted by The Astrophysical Journa