Ages and Masses for Nine "Super-Metal-Rich" Fields Stars

Details Ages and Masses for Nine "Super-Metal-Rich" Fields Stars Ages and Masses for Nine "Super-Metal-Rich" Fields Stars

Jun 1971

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1971bott....6...15t&link_type=abstract

Boletín de los Observatorios de Tonantzintla y Tacubaya Vol. 6, pp. 15-19 (1971) (http://www.astroscu.unam.mx/~bott/)

Astronomy and Astrophysics

Astronomy

6

Stars: Abundances, Stars: Color-Magnitude Diagrams, Stars: Evolution, Stars: Luminosity, Mass Function

Scientific paper

A comparison with theoretical evolutionary models was made for nine field K-giants of known supermetallicity and distance, yielding the approximate age and mass of each star. The average values for the group are 6.2 X 10^9 years and 1.2~M_&sun;, or 5.5 X 10^9 years and 1.3~M_&sun;, respectively, depending on whether Z_&sun; is taken as 0.015, or 0.025. The galactic orbital parameters of the stars also indicate that they are younger than the galaxy. This result of intermediate age lends further support to the low ages derived for NGC 188, M67 and NGC 6791 by Torres-Peimbert (1971a).

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