A standard stellar library for evolutionary synthesis: I. Calibration of theoretical spectra

Details A standard stellar library for evolutionary synthesis: I. Calibration of theoretical spectra A standard stellar library for evolutionary synthesis: I. Calibration of theoretical spectra

1997-01-06

arxiv.org/abs/astro-ph/9701019v1

Astron.Astrophys.Suppl.Ser.125:229-246,1997

Astronomy and Astrophysics

Astrophysics

17 pages, Latex, 19 Figures (postscript), accepted for publication in A&A. Also available with figures as ps-file at http://

Scientific paper

10.1051/aas:1997373

A comprehensive hybrid library of synthetic stellar spectra based on three original grids of model atmosphere spectra by Kurucz (1995), Fluks et al. (1994), and Bessell et al. (1989, 1991) is presented. The combined library is intended for multiple-purpose synthetic photometry applications and is constructed in order (i) to cover the largest possible ranges in Teff, log g, and [M/H]), (ii) to provide flux spectra with useful resolution on the uniform grid of wavelengths, and (iii) to provide realistic synthetic broad-band colors for the largest possible parameter and wavelength ranges. For each value of the effective temperature and for each wavelength, we calculate the correction function that must be applied to a (theoretical) solar-abundance model flux spectrum which yields synthetic UBVRIJHKL colors matching the (empirical) color-temperature calibrations derived from observations. The calibration algorithm is designed to preserve the original differential grid properties implied by metallicity and/or luminosity changes in the new library. The corresponding color calibration is described in some detail.

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