EDP Sciences
Free access
Issue
A&A
Volume 443, Number 2, November IV 2005
Page(s) 735 - 746
Section On-line catalogs and data
DOI http://dx.doi.org/10.1051/0004-6361:20053511


A&A 443, 735-746 (2005)
DOI: 10.1051/0004-6361:20053511

A library of high resolution synthetic stellar spectra from 300 nm to 1.8 ${\rm\mu}$m with solar and $\alpha$-enhanced composition

P. Coelho1, 2, B. Barbuy1, J. Meléndez3, R. P. Schiavon4 and B. V. Castilho5

1  Universidade de São Paulo, Rua do Matão 1226, São Paulo 05508-900, Brazil
    e-mail: pcoelho@usp.br;barbuy@astro.iag.usp.br
2  Max-Planck-Institut für Astrophysik, Karl-Schwarzschild-Strasse 1, 85741 Garching, Germany
    e-mail: pcoelho@mpa-garching.mpg.de
3  Department of Astronomy, Caltech, 1200 E. California Blvd, Pasadena, CA 91125, USA
    e-mail: jorge@astro.caltech.edu
4  Department of Astronomy, University of Virginia, PO Box 3818, Charlottesville, VA 22903-0818, USA
    e-mail: ripisc@virginia.edu
5  Laboratório Nacional de Astrofísica / MCT, CP 21, 37500-000 Itajubá, Brazil
    e-mail: bruno@lna.br

(Received 25 May 2005 / Accepted 21 July 2005 )

Abstract
Libraries of stellar spectra are fundamental tools for the study of stellar populations, and both empirical and synthetic libraries have been used for this purpose. In this paper, a new library of high resolution synthetic spectra is presented, ranging from the near-ultraviolet (300 nm) to the near-infrared (1.8 ${\rm\mu}$m). The library spans all the stellar types that are relevant to the integrated light of old and intermediate-age stellar populations in the involved spectral region (spectral types F through M and all luminosity classes). The grid was computed for metallicities ranging from [Fe/H] = -2.5 to +0.5, including both solar and $\alpha$-enhanced ([ $\alpha$/Fe] = 0.4) chemical compositions. The synthetic spectra are a good match to observations of stars throughout the stellar parameter space encompassed by the library and over the whole spectral region covered by the computations.


Key words: stars: atmospheres

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