Revised Yale Isochrones and Luminosity Functions (Green+ 1987)

Details Revised Yale Isochrones and Luminosity Functions (Green+ 1987) Revised Yale Isochrones and Luminosity Functions (Green+ 1987)

Jul 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996ycat.6040....0g&link_type=abstract

VizieR On-line Data Catalog: VI/40. Originally published in: Yale University Observatory, New Haven, Connecticut (1987)

Astronomy and Astrophysics

Astronomy

Models: Evolutionary, Isochrones, Stars: Ages

Scientific paper

The revised isochrones and luminosity functions (LFs) are based on the stellar evolution calculations of Mengel et al. (1979) and Sweigart and Gross (1978). The revised tables comprise the most complete (as of 1987) isochrone grid available in both age and composition. The improvement in the revised catalog is the inclusion of UBVRI data as well as the theoretical quantities, which are empirically matched to a wide range of observational UBVRI data (Green et al. 1987, unpublished). These tables enable users to interpolate between isochrones, to plot isochrones in order to fit color-magnitude diagrams, luminosity functions to compare with observational data, and to construct stellar population models. To facilitate the use of isochrones, we (at the Astronomical Data Center, in 1987) had made available several FORTRAN programs, ISOTRP, LF, and subroutines. They incorporate our experience of the best methods of interpolation, minimization of precision problems, and how to deal with compositions and ages that are not always complete. ISOTRP allows the user to interpolate for any helium abundance or metallicity in the range of the Revised Yale Isochrone tables. LF constructs customized differential luminosity functions for Mbol or a UBVRI magnitude, for any bin size, and for any initial mass functions. In addition to the 24 isochrone files and the FORTRAN programs, we (at ADC) have included the color table that was used to convert from [Fe/H], log Teff, and log g to BC, U-B, B-V, V-R, R-I, in the isochrone data files. The data cover a complete grid with [Fe/H] from 1.00 to -3.5 in steps of 0.50, Teff from 2800 to 20000 K, and log g from 0.00 to 6.00. (26 data files).

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