The Dartmouth Stellar Evolution Database

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Abstract
The ever-expanding depth and quality of photometric and spectroscopic observations of stellar populations increase the need for theoretical models in regions of age-composition parameter space that are largely unexplored at present. Stellar evolution models that employ the most advanced physics and cover a wide range of compositions are needed to extract the most information from current observations of both resolved and unresolved stellar populations. The Dartmouth Stellar Evolution Database is a collection of stellar evolution tracks and isochrones that spans a range of [Fe/H] from –2.5 to +0.5, -->[α/Fe] from –0.2 to +0.8 (for -->[Fe/H] ≤ 0) or +0.2 (for -->[Fe/H] > 0), and initial He mass fractions from -->Y = 0.245 to 0.40. Stellar evolution tracks were computed for masses between 0.1 and 4 -->M☉, allowing isochrones to be generated for ages as young as 250 Myr. For the range in masses where the core He flash occurs, separate He-burning tracks were computed starting from the zero age horizontal branch. The tracks and isochrones have been transformed to the observational plane in a variety of photometric systems including standard -->UBV(RI)C, Stromgren uvby, SDSS ugriz, 2MASS -->JHKs, and HST ACS/WFC and WFPC2. The Dartmouth Stellar Evolution Database is accessible through a Web site at http://stellar.dartmouth.edu/~models/ where all tracks, isochrones, and additional files can be downloaded.
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