Grids of pre-main sequence stellar models. The accretion scenario at Z=0.001 and Z=0.020.

Details Grids of pre-main sequence stellar models. The accretion scenario at Z=0.001 and Z=0.020. Grids of pre-main sequence stellar models. The accretion scenario at Z=0.001 and Z=0.020.

Nov 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996a%26as..120...57b&link_type=abstract

Astronomy and Astrophysics Supplement, v.120, p.57-61

Astronomy and Astrophysics

Astrophysics

40

Stars: Evolution, Stars: Pre-Main Sequence, Hertzsprung-Russel (Hr) Diagram

Scientific paper

I present and briefly discuss a new set of pre-main sequence (MS) evolutionary tracks computed in the framework of the accretion paradigm for star formation at metallicities Z=0.001 and Z=0.020. Improved birthlines are obtained from a time-dependent prescription for the accretion rate. These evolutionary sequences are better suited than the canonical approach which starts arbitrarily high on a luminous Hayashi adiabat, to interpret color-magnitude diagrams and ages of young stellar associations. They also constitute a (both physical and numerical) self-consistent extension to the post-MS stellar models previously published by the Geneva group (Schaller et al. 1992A&AS...96..269S).

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