Journal Article

PARSEC: stellar tracks and isochrones with the PAdova and TRieste Stellar Evolution Code

Alessandro Bressan, Paola Marigo, Léo Girardi, Bernardo Salasnich, Claudia Dal Cero, Stefano Rubele and Ambra Nanni

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 427, issue 1, pages 127-145
Published in print November 2012 | ISSN: 0035-8711
Published online November 2012 | e-ISSN: 1365-2966 | DOI:
PARSEC: stellar tracks and isochrones with the PAdova and TRieste Stellar Evolution Code

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We present the updated version of the code used to compute stellar evolutionary tracks in Padova. It is the result of a thorough revision of the major input physics, together with the inclusion of the pre-main sequence phase, not present in our previous releases of stellar models. Another innovative aspect is the possibility of promptly generating accurate opacity tables fully consistent with any selected initial chemical composition, by coupling the Opacity Project At Livermore (OPAL) data at high temperatures to the molecular opacities computed with our æsopus code. In this work, we present extended sets of stellar evolutionary models for various initial chemical compositions, while other sets with different metallicities and/or different distributions of heavy elements are being computed. For the present release of models, we adopt the solar distribution of heavy elements from the recent revision by Caffau et al., corresponding to a Sun's metallicity Z ≃ 0.0152. From all computed sets of stellar tracks, we also derive isochrones in several photometric systems. The aim is to provide the community with the basic tools to model star clusters and galaxies by means of population synthesis techniques.

Keywords: stars: evolution; Hertzsprung‒Russell and colour magnitude diagrams; stars: interiors; stars: low-mass

Journal Article.  12991 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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