The Pisa pre-main sequence tracks and isochrones. A database covering a wide range of Z, Y, mass, and age values

E. Tognelli, P. G. Prada Moroni, S. Degl'Innocenti

In recent years new observations of pre-main sequence stars (pre-MS) with Z <= Zsun have been made available. To take full advantage of the continuously growing amount of data of p…