Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977a%26a....54..779p&link_type=abstract
Astronomy and Astrophysics, vol. 54, no. 3, Feb. 1977, p. 779-795.
Astronomy and Astrophysics
Astrophysics
132
Chemical Composition, Fine Structure, Hertzsprung-Russell Diagram, Stellar Atmospheres, Stellar Evolution, Stellar Mass, Abundance, Astronomical Catalogs, Bolometers, Helium, Stellar Models, Stellar Temperature, Tables (Data), Thermodynamic Equilibrium
Scientific paper
The evolution of a large number of stars in the solar neighborhood was studied on the basis of H-R diagrams converted to log T(eff), M(bol). Effective temperatures were based on reliable model-atmosphere computations, and reasonably accurate absolute bolometric magnitudes were obtained from absolute magnitudes of stars having well determined parallaxes and requiring small bolometric corrections. A special metal index was also evaluated for each star, in order to account for variation of metal content from star to star. The observational log T(eff), M(bol) diagrams are discussed in relation to the theoretical evolutionary and isochrone grids of Hejlesen (1975). The masses of the stars in the sample are estimated, and the ages of evolved stars are also estimated. A metal content versus age relation for disk stars is given.
Cayrel Roger
Cayrel de Strobel G.
Hejlesen P. M.
Perrin M.-N.
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