Observed and computed spectral distribution of early-type stars. II - Determination of T(e) for B5-A0 stars

Astronomy and Astrophysics – Astronomy

Scientific paper

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B Stars, Early Stars, Spectral Energy Distribution, Stellar Spectra, Ultraviolet Astronomy, Visible Spectrum, A Stars, Abundance, Calibrating, Stellar Luminosity

Scientific paper

The automatic and fast procedure described in Malagnini et al (1982) has been applied to a comparison of UV and visual spectral distributions with Kurucz' (1979) models. The 48 stars of spectral types B-A0 and luminosity classes III-V that are included both in the Ultraviolet Bright Star Spectrophotometric Catalog and in the Breger Catalog have been analyzed. The complete set of observations permits fairly accurate effective temperature and angular diameter determinations. Comparisons with other sources are also presented. The comparison between computed and observed fluxes shows that the residuals are always very small in the visual region, while residuals in the region 1360-1500 A, at 1760 A, and at 2740 A, are fairly large and independent of spectral types.

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