New high resolution synthetic stellar libraries for the Gaia Mission

TL;DR

This paper introduces new high-resolution synthetic stellar libraries across broad spectral ranges, covering diverse stellar parameters, significantly improving upon previous models for the Gaia Mission's data analysis.

Contribution

The authors present extensive new spectral libraries with enhanced resolution and parameter coverage, tailored for Gaia data preparation and stellar population studies.

Findings

Libraries cover 300-1100 nm at 0.1 nm resolution

Libraries include 840-890 nm at 0.001 nm resolution

Range of stellar parameters from super-metal-rich to very metal-poor

Abstract

High resolution synthetic stellar libraries are of fundamental importance for the preparation of the Gaia Mission. We present new sets of spectral stellar libraries covering two spectral ranges: 300 --1100 nm at 0.1 nm resolution, and 840 -- 890 nm at 0.001 nm resolution. These libraries span a large range in atmospheric parameters, from super-metal-rich to very metal-poor (-5.0 $<$[Fe/H]$<$+1.0), from cool to hot (\teff=3000--50000 K) stars, including peculiar abundance variations. The spectral resolution, spectral type coverage and number of models represent a substantial improvement over previous libraries used in population synthesis models and in atmospheric analysis.