The Updated BaSTI Stellar Evolution Models and Isochrones. I. Solar-scaled Calculations

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    Sebastian L. Hidalgo, Univ La Laguna, Universidad de la Laguna, Dept Astrophys, Adriano Pietrinferni, INAF Osservatorio Astron Abruzzo, Santi Cassisi, INAF Osservatorio Astron Abruzzo, Maurizio Salaris, Liverpool John Moores Univ, Liverpool John Moores University, Astrophys Res Inst, IC2, Alessio Mucciarelli, INAF Osservatorio Astrofis & Sci Spazio Bologna, Alessandro Savino, Univ Groningen, University of Groningen, Kapteyn Astron Inst, Antonio Aparicio, Univ La Laguna, Universidad de la Laguna, Dept Astrophys, Victor Silva Aguirre,
  • Kuldeep Verma

We present an updated release of the BaSTI (a Bag of Stellar Tracks and Isochrones) stellar model and isochrone library for a solar-scaled heavy element distribution. The main input physics that have been changed from the previous BaSTI release include the solar metal mixture, electron conduction opacities, a few nuclear reaction rates, bolometric corrections, and the treatment of the overshooting efficiency for shrinking convective cores. The new model calculations cover a mass range between 0.1 and 15 M-circle dot, 22 initial chemical compositions between [Fe/H] = -3.20 and + 0.45, with helium to metal enrichment ratio dY/dZ = 1.31. The isochrones cover an age range between 20 Myr and 14.5 Gyr, consistently take into account the pre-main-sequence phase, and have been translated to a large number of popular photometric systems. Asteroseismic properties of the theoretical models have also been calculated. We compare our isochrones with results from independent databases and with several sets of observations to test the accuracy of the calculations. All stellar evolution tracks, asteroseismic properties, and isochrones are made available through a dedicated web site.

Original languageEnglish
Article number125
JournalAstronomical Journal
Volume856
Issue number2
Number of pages22
ISSN0004-6256
DOIs
StatePublished - 1 Apr 2018

    Research areas

  • galaxies: stellar content, Galaxy: disk, open clusters and associations: general, stars: evolution, stars: general, LOW-MASS STARS, COLOR-MAGNITUDE DIAGRAM, THERMONUCLEAR REACTION-RATES, ASTROPHYSICAL REACTION-RATE, HORIZONTAL-BRANCH STARS, OPEN CLUSTER NGC-6791, EQUATION-OF-STATE, POPULATION SYNTHESIS, INTERMEDIATE-MASS, METALLICITY CALIBRATION

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