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.
@article{arxiv.1308.4505,
title = {Spectropolarimetric observations of cool DQ white dwarfs},
author = {Tommi Vornanen and Svetlana Berdyugina and Andrei Berdyugin},
journal= {arXiv preprint arXiv:1308.4505},
year = {2013}
}
Comments
4 pages, 4 figures. Accepted for publication in Astronomy & Astrophysics