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France Allard
C.R.A.L (UML 5574) Ecole Normale Superieure, 69364 Lyon Cedex 7, France

Peter H. Hauschildt
Dept. of Physics and Astronomy & Center for Simulational Physics, University of Georgia, Athens, GA 30602-2451

Andreas Schweitzer
Dept. of Physics and Astronomy, University of Georgia, Athens, GA 30602-2451


We present a grid of spherically symmetric model atmospheres for young pre-MS stars. This grid spans the parameter range $2000\,{\rm K}\leq \hbox{$\,T_{\rm eff}$}\leq 6800\,{\rm K}$ and $2.0 \leq \log(g)\leq 3.5$ for $M=0.1\hbox{$\,$M$_\odot$}$, appropriate for low mass stars and brown dwarfs. A major improvement is the replacement of TiO and H2O line lists with the newer line list calculated by the NASA-AMES group, for TiO (about 175 million lines of 5 isotopes) and for H2O (about 350 million lines in 2 isotopes). We provide the model structures, spectra and broad-band colors in standard filters in electronic form.


Peter H. Hauschildt