A New Extensive Library of Synthetic Stellar Spectra from PHOENIX Atmospheres and its Application to Fitting VLT MUSE Spectra

TL;DR

This paper introduces a comprehensive library of synthetic stellar spectra generated with PHOENIX, covering a broad wavelength range and parameter space, and presents a new spectral fitting method tailored for VLT MUSE data.

Contribution

The paper provides a new extensive library of synthetic spectra with high resolution and a novel microturbulence description, along with a spectral fitting method for VLT MUSE observations.

Findings

Library covers 500Å to 55000Å with high resolution.

Method accurately determines stellar parameters and element abundances.

Library will be publicly available for download.

Abstract

We present a new library of synthetic spectra based on the stellar atmosphere code PHOENIX. It covers the wavelength range from 500{\AA} to 55000{\AA} with a resolution of R=500000 in the optical and near IR, R=100000 in the IR and {\Delta}{\lambda}=0.1{\AA} in the UV. The parameter space covers 2300K<=Teff<=8000K, 0.0<=log(g)<=6.0, -4.0<=[Fe/H]<=+1.0 and -0.3<=[{\alpha}/Fe]<=+0.8. The library is work-in-progress and going to be extended to at least Teff=25000K. We use a new self-consistent way of describing the microturbulence for our model atmospheres. The entire library of synthetic spectra will be available for download. Futhermore we present a method for fitting spectra, especially designed to work with the new 2nd generation VLT instrument MUSE. We show that we can determine stellar parameters (Teff, log(g), [Fe/H] and [{\alpha}/Fe]) and even single element abundances.