Seventy-two grids of stellar evolutionary tracks , along with the capability to generate isochrones and luminosity/color functions from them , are presented in this investigation . All of the model grids may be obtained from the Canadian Astronomy Data Center ( http : //www.cadc-ccda.hia- iha.nrc-cnrc.gc.ca/cvo/community/VictoriaReginaModels/ ) .
Included in this archive are ( i ) the interpolation software ( FORTRAN 77 ) to produce isochrones , isochrone probability functions , luminosity functions , and color functions , along with instructions on how to implement and use the software , ( ii ) BVRI ( VandenBerg & Clem 2003 ) and uvby ( Clem et al . 22 ) color-temperature relations , and ( iii ) Zero-Age Horizontal Branch loci for all of the chemical compositions considered . Sixty of them extend ( and encompass ) the sets of models reported by VandenBerg et al .
( 2000 , ApJ , 532 , 430 ) for 17 [ Fe/H ] values from -2.31 to -0.30 and \alpha -element abundances corresponding to [ \alpha /Fe ] = 0.0 , 0.3 , and 0.6 ( at each iron abundance ) to the solar metallicity and to sufficiently high masses ( up to \sim 2.2 { { \cal M } _ { \odot } } ) that isochrones may be computed for ages as low as 1 Gyr .
The remaining grids contain tracks for masses from 0.4 to 4.0 { { \cal M } _ { \odot } } and 12 [ Fe/H ] values between -0.60 and +0.49 ( assuming solar metal-to-hydrogen number abundance ratios ) : in this case , isochrones may be calculated down to \sim 0.2 Gyr .
The extent of convective core overshooting has been modelled using a parameterized version of the Roxburgh ( 1989 , A & A , 211 , 361 ) criterion , in which the value of the free parameter at a given mass and its dependence on mass have been determined from analyses of binary star data and the observed color-magnitude diagrams for several open clusters .
Because the calculations reported herein satisfy many empirical constraints , they should provide useful probes into the properties of both simple and complex stellar populations .