The Ages of the Thin Disk, Thick Disk, and the Halo from Nearby White Dwarfs
Mukremin Kilic et al 2017 ApJ 837 162
A detailed analysis of the white dwarfs in the local 40 pc suggests ages of 6.8–7.0 Gyr for the thin disk and 8.6–8.8 Gyr for the thick disk. The inner galactic halo is estimated to have an age of 9.1–13.9 Gyr.