First release of PLATO consortium stellar limb-darkening coefficients

TL;DR

This paper presents the first grid of stellar limb-darkening coefficients and intensity profiles for the upcoming PLATO mission, including updates for the Kepler mission, based on spectral synthesis and convolution with instrument response functions.

Contribution

It provides the first publicly available LDCs and IPs for PLATO, derived from spectral synthesis on MARCS models and convolved with instrument response, enhancing stellar characterization tools.

Findings

First LDC and IP grid for PLATO mission.

Includes LDCs and IPs for Kepler mission.

Data available for download at specified link.

Abstract

We release the first grid of stellar limb-darkening coefficients (LDCs) and intensity profiles (IPs) computed by the consortium of the PLAnetary Transits and Oscillations of stars (PLATO), the next medium-class (M3) mission under development by the European Space Agency (ESA) to be launched in 2026. We have performed spectral synthesis with \texttt{TurboSpectrum} on a grid of \texttt{MARCS} model atmospheres. Finally, we adopted \texttt{ExoTETHyS} to convolve the high-resolution spectra ($R=2\times10^5$) with the state-of-the-art response functions for all the PLATO cameras, and computed the LDCs that best approximate the convolved IPs. In addition to the PLATO products, we provide new LDCs and IPs for the Kepler mission, based on the same grid of stellar atmospheric models and calculation procedures. The data can be downloaded from the following link: \url{https://doi.org/10.5281/zenodo.7339706}.