YREC Isochrones and Evolutionary Tracks

This site provides access to isochrones and evolutionary tracks produced by the version of the Yale Rotating Evolutionary Code (YREC) used at The Ohio State University.

There are several versions of the tracks and isochrones, as listed in the table below. Each link in the 2nd column of the table takes you to a page that you can used to view or download the computations. As we proceed publication, more entries will be added.

Set	Description	Publication (links are to the ADS abstract service or astro-ph)	Comments
1	An Empirical Isochrone for the Hyades	Pinsonneault et al. 2004, "The Distances to Open Clusters from Main-Sequence Fitting. II. Construction of Empirically Calibrated Isochrones," ApJ, 600, 946.
2	Isochrones for [Fe/H] >= -0.3 with empirical calibration based on the Hyades	An et al. 2007, "The Distances to Open Clusters from Main-Sequence Fitting. III. Improved Accuracy with Empirically Calibrated Isochrones," ApJ, 655, 233. This paper tests the accuracy of the Hyades empirical calibration using nearby well-studied open clusters with extensive multicolor photometry.	baseline isochrones with several color calibrations, including an empirical calibration for BVIK colors
3	Isochrones with empirical corrections for the upper main sequence, calibrated on the Pleiades and the Hyades	An, Terndrup, & Pinsonneault 2007, "The Distances to Open Clusters from Main-Sequence Fitting. IV. Galactic Cepheids, the LMC, and the Local Distance Scale," ApJ, 671, 1640. This paper reexamines the distance scale established by Galactic open clusters containing Cepheid variables.	Ages from 20 Myr to 4 Gyr, [Fe/H] from -0.3 to +0.2.
4	A Library of isochrones in the SDSS griz system with M67-based empirical corrections	An et al. 2009, "Galactic Globular and Open Clusters in the Sloan Digital Sky Survey. II. Test of Theoretical Stellar Isochrones" ApJ, 700, 523 (preprint astro-ph/0905.3743)	Metallicities from [Fe/H] = -3.0 to + 0.4, low metallicity isochrones with elevated alpha-element abundances
5	Evolutionary tracks for [Fe/H] > = -0.3 using the OP and OPAL equations of state.	In preparation

Web site authors: Donald Terndrup, Deokkeun An, Mandi LaHue, Marc Pinsonneault, Ben Sostrom.

Acknowledgements: This work is partly supported by NSF grant AST-0807308 to the Ohio State University Research Foundation.

Contact information:
    Donald M. Terndrup
    Department of Astronomy
    Ohio State University
    140 West 18th Avenue
    Columbus, OH 43210   USA
    Phone: (+1) 614-292-4579
    Email: terndrup [at] astronomy [dot] ohio-state [dot] edu