SIMBAD references

2018MNRAS.480.1211R - Mon. Not. R. Astron. Soc., 480, 1211-1217 (2018/October-2)

Discovery of two bright DO-type white dwarfs.


Abstract (from CDS):

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 Teff = 80000±4600 K and logg = 8.25±0.15 for J0536+5448 and Teff = 69400±900 K and logg = 7.80±0.06 for J2311+2929. The latter shows a significant amount of carbon in its atmosphere (C=0.003+0.005–0.002, 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.

Abstract Copyright: © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): stars: abundances - stars: atmospheres - white dwarfs

Simbad objects: 11

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