Stellar atmospheric parameters and the Gaia-ESO Survey experience with multiple analysis pipelines

TL;DR

This paper discusses the Gaia-ESO Survey's approach to calibrating stellar atmospheric parameters using multiple analysis pipelines to ensure accuracy and precision in stellar spectra libraries.

Contribution

It introduces a comprehensive calibration method employing multiple analysis pipelines to evaluate and improve the accuracy of stellar atmospheric parameters.

Findings

Implementation of multiple analysis pipelines enhances parameter reliability

Calibration efforts improve the precision of stellar atmospheric measurements

The approach helps quantify uncertainties in stellar parameter estimation

Abstract

To use libraries of observed stellar spectra, one needs to know the atmospheric parameters of the stars associated to those spectra. It is, however, hard to know what are the real levels of precision and accuracy of these parameters. To overcome this very same problem in a stellar survey, the Gaia-ESO Survey implements a comprehensive calibration effort together with the use of multiple parallel analysis methodologies. Here, we discuss the multiple analyses approach and the effort to understand the accuracy and precision of the provided stellar atmospheric parameters.