Medium-resolution Isaac Newton Telescope library of empirical spectra - II. The stellar atmospheric parameters



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Cenarro, A. J. and Peletier, R. F. and Sánchez Blázquez, P. and Selam, S. O. and Toloba, E. and Cardiel López, Nicolás and Falcón Barroso, J. and Gorgas García, Francisco Javier and Jiménez Vicente, J. and Vazdekis, A. (2007) Medium-resolution Isaac Newton Telescope library of empirical spectra - II. The stellar atmospheric parameters. Monthly notices of the Royal Astronomical Society, 374 (2). pp. 664-690. ISSN 0035-8711

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We present a homogeneous set of stellar atmospheric parameters (T-eff, log g, [Fe/H]) for MILES, a new spectral stellar library covering the range lambda lambda 3525-7500 angstrom at 2.3 angstrom (FWHM) spectral resolution. The library consists of 985 stars spanning a large range in atmospheric parameters, from super-metal-rich, cool stars to hot, metal-poor stars. The spectral resolution, spectral type coverage and number of stars represent a substantial improvement over previous libraries used in population synthesis models. The atmospheric parameters that we present here are the result of a previous, extensive compilation from the literature. In order to construct a homogeneous data set of atmospheric parameters we have taken the sample of stars of Soubiran, Katz & Cayrel, which has very well determined fundamental parameters, as the standard reference system for our field stars, and have calibrated and bootstrapped the data from other papers against it. The atmospheric parameters for our cluster stars have also been revised and updated according to recent metallicity scales, colour-temperature relations and improved set of isochrones.

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This article has been accepted for publication in Monthly notices of the Royal Astronomical Society. © 2006 The Authors. Journal compilation © 2006 RAS. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. We thank the referee Raffaele Gratton for fruitful suggestions that improved the quality of this paper. This work was supported by the Spanish research projects AYA2003–01840 and AYA2004–03059. SOS acknowledges the financial support by the Turkish Scientific and Technical Research Council (TÜBITAK) through the NATO-B2 fellowship and the School of Physics and Astronomy (University of Nottingham). AV is a Ramón y Cajal Fellow of the Spanish Ministry of Education and Science. This research has made use of the SIMBAD data base (operated at CDS, Strasbourg, France), the NASA’s Astrophysics Data System Article Service, and the Hipparcos Input Catalogue. This paper is based on observations obtained at the Isaac Newton Telescope, operated by the Isaac Newton Group in the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofísica de Canarias. The authors are grateful to the ASTRON-PC and CAT for generous allocation of telescope time.

Uncontrolled Keywords:Metal-Poor Stars, Infrared CAII Triplet, Globular-Cluster M71, Elodie Echelle Spectra, Deficient Red Giants, RR Lyrae Stars, Main-Sequence, Halo Stars, Effective Temperatures, T-EFF
Subjects:Sciences > Physics > Astrophysics
Sciences > Physics > Astronomy
Sciences > Physics > Atmospheric physics
ID Code:28303
Deposited On:11 Feb 2015 15:57
Last Modified:10 Dec 2018 15:05

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