Astronomy and Astrophysics – Astrophysics
Scientific paper
1999-10-08
Astron.Astrophys.Suppl.Ser.141:371-383,2000
Astronomy and Astrophysics
Astrophysics
13 pages, submitted to A&A Supplement Series. The data tables can be found in electronic form in http://pleiadi.pd.astro.it
Scientific paper
10.1051/aas:2000126
We present a large grid of stellar evolutionary tracks, which are suitable to modelling star clusters and galaxies by means of population synthesis. The tracks are presented for the initial chemical compositions [Z=0.0004, Y=0.23], [Z=0.001, Y=0.23], [Z=0.004, Y=0.24], [Z=0.008, Y=0.25], [Z=0.019, Y=0.273] (solar composition), and [Z=0.03, Y=0.30]. They are computed with updated opacities and equation of state, and a moderate amount of convective overshoot. The range of initial masses goes from 0.15 M_sun to 7 M_sun, and the evolutionary phases extend from the zero age main sequence (ZAMS) till either the thermally pulsing AGB regime or carbon ignition. We also present an additional set of models with solar composition, computed using the classical Schwarzschild's criterion for convective boundaries. From all these tracks, we derive the theoretical isochrones in the Johnson-Cousins UBVRIJHK broad-band photometric system.
Bertelli Gianpaolo
Bressan Alessandro
Chiosi Cesare
Girardi Leo
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