Stellar models for very low mass main sequence stars: the role of model atmospheres

Details Stellar models for very low mass main sequence stars: the role of model atmospheres Stellar models for very low mass main sequence stars: the role of model atmospheres

1997-08-06

arxiv.org/abs/astro-ph/9708055v1

Astronomy and Astrophysics

Astrophysics

10 pages including 13 figures, gzip postscript file, To be published in MNRAS

Scientific paper

10.1046/j.1365-8711.1998.01350.x

We present Very Low Mass stellar models as computed including non-grey model atmospheres for selected assumptions about the star metallicities. The role of atmospheres is discussed and the models are compared with models based on the Eddington approximation and with similar models appeared in the recent literature. Theoretical predictions concerning both the HR diagram location and the mass-luminosity relation are presented and discussed in terms of expectations in selected photometric bands. Comparison with available observational data concerning both galactic globular clusters and dwarfs in the solar neighborhood reveals a satisfactory agreement together with the existence of some residual mismatches.

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