A new extensive library of PHOENIX stellar atmospheres and synthetic spectra

TLDR

The authors introduce a new high‑resolution PHOENIX‑based spectral library, present a self‑consistent micro‑turbulence model, and plan to extend it to 25,000 K. They generate spherical PHOENIX model atmospheres and produce detailed synthetic spectra spanning 500 Å to 50,000 Å at resolutions up to R = 500,000, covering a parameter space of 2,300–12,000 K, log g 0–6, [Fe/H] –4 to +1, and [α/Fe] –0.2 to +1.2.

Abstract

We present a new library of high-resolution synthetic spectra based on the stellar atmosphere code PHOENIX that can be used for a wide range of applications of spectral analysis and stellar parameter synthesis. The spherical mode of PHOENIX was used to create model atmospheres and to derive detailed synthetic stellar spectra from them. We present a new self-consistent way of describing micro-turbulence for our model atmospheres. The synthetic spectra cover the wavelength range from 500AA to 50.000AA with resolutions of R=500.000 in the optical and near IR, R=100.000 in the IR and a step size of 0.1AA in the UV. The parameter space covers 2.300K<=Teff<=12.000K, 0.0<=log(g)<=+6.0, -4.0<=[Fe/H]<=+1.0, and -0.2<=[alpha/Fe]<=+1.2. The library is a work in progress and we expect to extend it up to Teff=25.000 K.