The Ariel 0.6 - 7.8 $\mu$m stellar limb-darkening coefficients

Abstract

We provide here tables of stellar limb-darkening coefficients (LDCs) for the Ariel ESA M4 space mission. These tables include LDCs corresponding to different wavelength bins and white bands for the NIRSpec, AIRS-Ch0 and AIRS-Ch1 spectrographs, and those corresponding to the VISPhot, FGS1 and FGS2 photometers. The LDCs are calculated with the open-source software ExoTETHyS for three complete grids of stellar atmosphere models obtained with the ATLAS9 and PHOENIX codes. The three model grids are complementary, as the PHOENIX code adopts more modern input physics and spherical geometry, while the models calculated with ATLAS9 cover wider ranges of stellar parameters. The LDCs obtained from corresponding models in the ATLAS9 and PHOENIX grids are compared in the main text. All together the models cover the following ranges in effective temperature ($1\,500 \, K \le T_{\mbox{eff}} \le 50\,000 \, K$), surface gravity (0.0 dex $\le \log g\le 6.0$ dex), and metallicity ($-5.0\le [M/H]\le 1.0$).

arXiv commentPublished on Experimental Astronomy (2021) - Ariel Special Issue Supplemental - Material available online: https://www.dropbox.com/sh/jujhndaoh9cwqep/AABIoJB7DaPaG2YzHiwal_HJa?dl=0

References in corpus (30)

• Analytic Lightcurves for Planetary Transit Searches
• A new extensive library of PHOENIX stellar atmospheres and synthetic spectra
• The Limiting Effects of Dust in Brown Dwarf Model Atmospheres
• Efficient, uninformative sampling of limb darkening coefficients for two-parameter laws
• Model Atmospheres for M (Sub)Dwarfs: I. The base model grid
• Stellar Limb-Darkening Coefficients for CoRot and Kepler
• Limb darkening and exoplanets: testing stellar model atmospheres and identifying biases in transit parameters
• Using Stellar Limb-Darkening to Refine the Properties of HD 209458b
• LDTk: Limb Darkening Toolkit
• The Stagger-grid: A grid of 3D stellar atmosphere models - IV. Limb darkening coefficients
• Dust in brown dwarfs and extra-solar planets II. Cloud formation for cosmologically evolving abundances
• A new method to compute limb-darkening coefficients for stellar atmosphere models with spherical symmetry: the space missions TESS, Kepler, Corot, and MOST
• An Updated Study of Potential Targets for Ariel
• On stellar limb darkening and exoplanetary transits
• Limb-darkening and exoplanets II: Choosing the Best Law for Optimal Retrieval of Transit Parameters
• The center-to-limb variation across the Fraunhofer lines of HD 189733; Sampling the stellar spectrum using a transiting planet
• Tests of stellar model atmospheres by optical interferometry: VLTI/VINCI limb-darkening measurements of the M4 giant psi phe
• New limb-darkening coefficients and synthetic photometry for model-atmosphere grids at Galactic, LMC, and SMC abundances
• High-precision stellar limb-darkening in exoplanetary transits
• The ExoTETHyS package: Tools for Exoplanetary Transits around Host Stars
• Comparison of the power-2 limb-darkening law from the Stagger-grid to Kepler light curves of transiting exoplanets
• Gravity and limb-darkening coefficients for compact stars: DA, DB, and DBA eclipsing white dwarfs
• Computing Limb Darkening Coefficients from Stellar Atmosphere Models
• Spherically-symmetric model stellar atmospheres and limb darkening I: limb-darkening laws, gravity-darkening coefficients and angular diameter corrections for red giant stars
• Spherically symmetric model stellar atmospheres and limb darkening II: limb-darkening laws, gravity-darkening coefficients and angular diameter corrections for FGK dwarf stars
• Efficient, uninformative sampling of limb-darkening coefficients for a three-parameter law
• The homogeneous characterisation of Ariel host stars
• Limb-darkening coefficients from line-blanketed non-LTE hot-star model atmospheres
• ExoSim: the Exoplanet Observation Simulator
• A SEA BASS on the exoplanet HD209458b