Stellar atmospheric parameters for 754 spectra from the X-shooter Spectral Library

Arentsen, Anke; Prugniel, Philippe; Gonneau, Anais; Lançon, Ariane; Trager, Scott; Peletier, Reynier; Lyubenova, Mariya; Chen, Yan-Ping; Falcón Barroso, Jesús; Sánchez Blázquez, Patricia; Vazdekis, Alejandro
Bibliographical reference

Astronomy and Astrophysics, Volume 627, id.A138, 14 pp.

Advertised on:
7
2019
Number of authors
11
IAC number of authors
2
Citations
46
Refereed citations
46
Description
Context. The X-shooter Spectral Library (XSL) is an empirical stellar library at medium spectral resolution covering the wavelength range from 3000 Å to 24 800 Å. This library aims to provide a benchmark for stellar population studies. Aims: In this work, we present a uniform set of stellar atmospheric parameters, effective temperatures, surface gravities, and iron abundances for 754 spectra of 616 XSL stars. Methods: We used the full-spectrum fitting package ULySS with the empirical MILES library as reference to fit the ultraviolet-blue (UVB) and visible (VIS) spectra. We tested the internal consistency and we compared our results with compilations from the literature. Results: The stars cover a range of effective temperature 2900 < Teff < 38 000 K, surface gravity 0 < logg < 5.7, and iron abundance -2.5 < [Fe/H] < +1.0, with a couple of stars extending down to [Fe/H] = -3.9. The precisions of the measurements for the G- and K-type stars are 0.9%, 0.14, and 0.06 in Teff, logg, and [Fe/H], respectively. For the cool giants with logg < 1, the precisions are 2.1%, 0.21, and 0.22, and for the other cool stars these values are 1%, 0.14, and 0.10. For the hotter stars (Teff > 6500 K), these values are 2.6%, 0.20, and 0.10 for the three parameters. Full Tables A.1-A.3 are only available at the CDS via anonymous ftp to http://cdsarc.u-strasbg.fr (ftp://130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/627/A138Based on ESO observations from run IDs 084.B-0869(A/B), 085.B-0751(A/B) and 189.B-0925(A/B/C/D).
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Traces of Galaxy Formation: Stellar populations, Dynamics and Morphology

We are a large, diverse, and very active research group aiming to provide a comprehensive picture for the formation of galaxies in the Universe. Rooted in detailed stellar population analysis, we are constantly exploring and developing new tools and ideas to understand how galaxies came to be what we now observe.

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