Spectropolarimetric observations of cool DQ white dwarfs



: T Vornanen, S V Berdyugina, A Berdyugin

Publisher: ESO

: 2013

: Astronomy and Astrophysics

: A&A

: A38

: 557

: 38

: 4

: 0004-6361

DOI: https://doi.org/10.1051/0004-6361/201220619


Following our recent discovery of a new magnetic DQ white dwarf (WD) with CH molecular features, we report the results for the rest of the DQ WDs from our survey. We use high signal-to-noise spectropolarimetric data to search for magnetic fields in a sample of 11 objects. One object in our sample, WD1235+422, shows the signs of continuum circular polarization that is similar to some peculiar DQs with unidentified molecular absorption bands, but the low S/N and spectral resolution of these data make more observations necessary to reveal the true nature of this object.

Last updated on 2024-26-11 at 21:06