We report the discovery of a new metal-rich DAZ white dwarf , GD 362 .
High signal-to-noise optical spectroscopy reveals the presence of spectral lines from hydrogen as well as Ca i , Ca ii , Mg i , and Fe i .
A detailed model atmosphere analysis of this star yields an effective temperature of T _ { eff } = 9740 \pm 50 K , a surface gravity of \log g = 9.12 \pm 0.07 , and photospheric abundances of \log { Ca / H } = -5.2 \pm 0.1 , \log { Mg / H } = -4.8 \pm 0.1 , and \log { Fe / H } = -4.5 \pm 0.1 .
White dwarf cooling models are used to derive a mass of 1.24 M _ { \odot } for GD 362 , making it the most massive and metal-rich DAZ uncovered to date .
The problems related to the presence of such large metal abundances in a nearby ( d \sim 25 pc ) white dwarf in terms of an accretion scenario are briefly discussed .