TY  - JOUR
A1  - Reindl, Nicole
A1  - Geier, Stephan Alfred
A1  - Ostensen, R. H.
T1  - Discovery of two bright DO-type white dwarfs
JF  - Monthly notices of the Royal Astronomical Society
N2  - We discovered two bright DO-type white dwarfs, GALEXJ053628.3+544854 (J0536+5448) and GALEXJ231128.0+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-eff = 80000 +/- 4600K and log g = 8.25 +/- 0.15 for J0536+5448 and T-eff = 69400 +/- 900K and log g = 7.80 +/- 0.06 for J2311+2929. The latter shows a significant amount of carbon in its atmosphere (C = 0.003(-0.002)(+0.005), by mass), while for J0536+5448 we could derive only an upper limit of C < 0.003. Furthermore, we calculated spectroscopic distances for the two stars and found a good agreement with the distances derived from the Gaia parallaxes.
KW  - stars: abundances
KW  - stars: atmospheres
KW  - white dwarfs
Y1  - 2018
U6  - https://doi.org/10.1093/mnras/sty1875
SN  - 0035-8711
SN  - 1365-2966
VL  - 480
IS  - 1
SP  - 1211
EP  - 1217
PB  - Oxford Univ. Press
CY  - Oxford
ER  -