A1 Refereed original research article in a scientific journal
Spectropolarimetric observations of cool DQ white dwarfs
Authors: T Vornanen, S V Berdyugina, A Berdyugin
Publisher: ESO
Publication year: 2013
Journal: Astronomy and Astrophysics
Journal acronym: A&A
Article number: A38
Volume: 557
First page : 38
Number of pages: 4
ISSN: 0004-6361
DOI: https://doi.org/10.1051/0004-6361/201220619
Abstract
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.
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.
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