Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26a...122..261t&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 122, no. 1-2, June 1983, p. 261-266.
Astronomy and Astrophysics
Astrophysics
18
Late Stars, Stellar Atmospheres, Stellar Spectra, Atmospheric Models, Chemical Composition, Data Reduction, Dwarf Stars, Metallicity, Open Clusters, Stellar Gravitation, Stellar Temperature
Scientific paper
A quantitative method of determining the physical parameters of late-type stars (effective temperature cooler than 7200 K) from the analysis of low resolution spectra (approximately 2 A) with multilayer model atmospheres has been developed. Causes of error in the effective temperature T(eff), gravity g and global metal abundance with respect to the sun using numerical tests have been discussed. It is shown that the atmospheric parameters have been determined with an accuracy similar to that claimed in detailed analyses from high resolution (approximately 0.2 A) spectra. This method has been applied to 16 stars with T(eff), g and global metal abundance with respect to the sun known from previous detailed analyses, and to 5 stars in the open cluster Praesepe. The results confirmed the reliability of the method.
Foy Renaud
Thévenin Frédéric
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