The X-shooter Spectral Library (XSL) in the near-infrared: Case study of carbon stars

A. Gonneau1,2*, A. Lanҫon1, S. C. Trager2, Y. P. Chen2, R. Peletier2, B. Aringer3,4 and W. Nowotny4
1Observatoire Astronomique de Strasbourg, Université de Strasbourg, CNRS, UMR 7550, 11 rue de l’Université, F-67000 Strasbourg, France
2Kapteyn Astronomical Institute, University of Groningen, Postbus 800, 9700 AV, Groningen, Netherlands
3Dipartimiento di Astronomica, Università di Padova, Vicolo dell’Osservatorio 2, 35122 Padova, Italy
4University of Vienna, Department of Astrophysics, Türkenschanzstraβe 17, A-1180 Wien, Austria

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Abstract

The X-shooter Spectral Library (XSL) is a new stellar spectral library, aiming at improving the spectral population synthesis models. This paper focuses on XSL spectra of carbon stars, which are key elements for population synthesis. A comparison with theoretical spectra is necessary to estimate the fundamental parameters of the observed stars, as well as to validate the spectral models across the broad ultraviolet to near-infrared wavelength range of X-shooter. We present the results of such comparisons.

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Keywords : spectroscopy, instrument: X-shooter, wavelength: near-infrared, stars: carbon