Note on the Power-2 Limb Darkening Law

Abstract

Recently there has been a renewed interest in the power-2 limb darkening law for modeling exoplanet transits. This law provides a better match to the intensities generated by spherical stellar atmosphere models than other 2-parameter laws. To help facilitate a wider use of the power-2 law we correct a minor error and, expanding on previous work, suggest a parametrization that can improve the sampling required by some numerical methods such as MCMC.

3 pages, 1 figure, published as a research note of the AAS

References in corpus (3)

• Limb darkening and exoplanets: testing stellar model atmospheres and identifying biases in transit parameters
• The Stagger-grid: A grid of 3D stellar atmosphere models - IV. Limb darkening coefficients
• Detectability of shape deformation in short-period exoplanets

Cited by in corpus (5)

• Analysis of Early Science observations with the CHaracterising ExOPlanets Satellite (CHEOPS) using pycheops
• Detection of the tidal deformation of WASP-103b at $3\sigma$ with CHEOPS
• Limb darkening measurements from TESS and Kepler light curves of transiting exoplanets
• The EBLM project -- XIV. TESS light curves for eclipsing binaries with very low mass companions
• Fast Transit Computation Using Tabulated Stellar Intensities