Constraints on the age and evolution of the Galaxy from the white dwarf luminosity function

摘要: The white dwarf disk luminosity function is explored using observational results of Liebert et al. (1988, 1989) as a template for comparison, and the cooling curves Wood (1990, 1991) input basis functions integration. star formation rate over history Galaxy found to be constant within an order magnitude, age lies in range 6-13.5 Gyr, where roughly 40 percent uncertainty due uncertainties. Using best current estimates inputs integration, ages from 7.5 11 i.e., they are substantially younger than most halo globular clusters but reasonable agreement with those open clusters. these differing populations, taken together, consistent pressure-supported collapse models early spiral Galactic evolution.