The 100 pc White Dwarf Sample in the SDSS Footprint

Understand

We present follow-up spectroscopy of 711 white dwarfs within 100 pc, and present a detailed model atmosphere analysis of the 100 pc white dwarf sample in the SDSS footprint.

• Our spectroscopic follow-up is complete for 83% of the white dwarfs hotter than 6000 K, where the atmospheric composition can be constrained reliably.
• We identify 1508 DA white dwarfs with pure hydrogen atmospheres.
• The DA mass distribution has an extremely narrow peak at $0.59~M_{\odot}$, and reveals a shoulder from relatively massive white dwarfs with $M=0.7$-$0.9~M_{\odot}$.