Free Access
Issue
Astron. Astrophys. Suppl. Ser.
Volume 120, Number 1, November_II 1996
Page(s) 57 - 61
DOI https://doi.org/10.1051/aas:1996274
Published online 15 November 1996
Grids of pre-main sequence stellar models. The accretion scenario at Z=0.001 and Z=0.020 DOI: 10.1051/aas:1996274

Astronomy and Astrophysics Supplement Series, Vol. 120, November II 1996, 57-61

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

P.A. Bernasconi

Observatoire de Genève, CH-1290 Sauverny, Switzerland
email: paolo.bernasconi@obs.unige.ch

Received February 12; accepted April 5, 1996

Abstract:

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. 1992).

Key words: stars: evolution --- stars: pre-main sequence --- Hertzsprung-Russel (HR) diagram


Copyright EDP Sciences
web@edpsciences.com

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.