Theoretical models of very low mass stars and brown dwarfs

The results of a new series of stellar evolution calculations are presented for very low mass stars (less than about 0.2 solar mass) and brown dwarfs (less than 0.08 solar mass). The dependence of the effective temperatures, luminosities, radii, etc., on the mixing length, the atmospheric opacities, and the helium fraction are studied along the very low mass star/brown dwarf continuum. Numerical data tables, isochrones, and evolutionary curves of the various observables and structural quantities are presented for seven models of fifteen masses each, between 0.03 solar mass and 0.2 solar mass.