Discovery of two bright DO-type white dwarfs

We discovered two bright DO-type white dwarfs, GALEX J053628.3+544854 (J0536+5448) and GALEX J231128.0+292935(J2311+2929), which rank among the eight brightest DO-type white dwarfs known. Our non-LTE model atmosphere analysis reveals effective temperatures and surface gravities of ${T_\mathrm{eff}}\, = 80000\pm 4600 \, \mathrm{K}$ and $\log g = 8.25\pm 0.15$ for J0536+5448 and ${T_\mathrm{eff}}\, ...