SIMBAD references

2002ApJ...577..377M - Astrophys. J., 577, 377-388 (2002/September-3)

Metallicity determinations from ultraviolet-visual spectrophotometry. I. The test sample.

MOROSSI C., DI MARCANTONIO P., FRANCHINI M., MALAGNINI M.L. and CHAVEZ M.

Abstract (from CDS):

New visual spectrophotometric observations of non-supergiant solar neighborhood stars are combined with IUE Newly Extracted Spectra (INES) energy distributions in order to derive their overall metallicities, [M/H]. This fundamental parameter, together with effective temperature and apparent angular diameter, is obtained by applying the flux-fitting method while surface gravity is derived from the comparison with evolutionary tracks in the theoretical H-R diagram. Trigonometric parallaxes for the stars of the sample are taken from the Hipparcos Catalogue. The quality of the flux calibration is discussed by analyzing a test sample via comparison with external photometry. The validity of the method in providing accurate metallicities is tested on a selected sample of G-type stars with well-determined atmospheric parameters from recent high-resolution spectral analysis. The extension of the overall procedure to the determination of the chemical composition of all the INES non-supergiant G-type stars with accurate parallaxes is planned in order to investigate their atmospheric temperature structure.

Abstract Copyright:

Journal keyword(s): Stars: Abundances - Stars: Fundamental Parameters - Ultraviolet: Stars

Simbad objects: 52

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2020.01.17-19:35:58

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