SIMBAD references

2000A&A...361.1023S - Astronomy and Astrophysics, volume 361, 1023-1035 (2000/9-3)

Evolutionary tracks and isochrones for α-enhanced stars.


Abstract (from CDS):

We present four large sets of evolutionary tracks for stars with initial chemical compositions [Y=0.250, Z=0.008], [Y=0.273, Z=0.019], [Y=0.320, Z=0.040] and [Y=0.390, Z=0.070] and enhancement of α elements with respect to the solar pattern. The major improvement with respect to previous similar calculations is that we use consistent opacities - i.e. computed with the same chemical composition as adopted in the stellar models - over the whole relevant range of temperatures. For the same initial chemical compositions [Y,Z] and otherwise identical input physics we present also new evolutionary sequences with solar-scaled mixtures of abundances. Based on these stellar models we calculate the corresponding sets of isochrones both in the Johnson-Cousins UBVRIJHK and HST/WFPC2 photometric systems. Furthermore, we derive integrated magnitudes, colours and mass-to-light ratios for ideal single stellar populations with total mass equal to 1M. Finally, the major changes in the tracks, isochrones, and integrated magnitudes and colours passing from solar-scaled to α-enhancedmixtures are briefly outlined. Retrieval of the complete data set is possible via the www page .

Abstract Copyright:

Journal keyword(s): stars: evolution - stars: interiors - stars: Hertzsprung-Russel (HR) and C-M diagrams

VizieR on-line data: <Available at CDS (J/A+A/361/1023): mstracks.dat hbtracks.dat isostmag.dat isovega.dat isojcmag.dat sspstmag.dat sspvega.dat sspjcmag.dat>

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