Spectropolarimetric Survey of Hydrogen-rich White Dwarf Stars

Details Spectropolarimetric Survey of Hydrogen-rich White Dwarf Stars Spectropolarimetric Survey of Hydrogen-rich White Dwarf Stars

2006-09-11

arxiv.org/abs/astro-ph/0609273v1

Astrophys.J.654:499-520,2006

Astronomy and Astrophysics

Astrophysics

Accepted for publication in ApJ

Scientific paper

10.1086/509072

We have conducted a survey of 61 southern white dwarfs searching for magnetic fields using Zeeman spectropolarimetry. Our objective is to obtain a magnetic field distribution for these objects and, in particular, to find white dwarfs with weak fields. We found one possible candidate (WD 0310-688) that may have a weak magnetic field of -6.1+/-2.2 kG. Next, we determine the fraction and distribution of magnetic white dwarfs in the Solar neighborhood, and investigate the probability of finding more of these objects based on the current incidence of magnetism in white dwarfs within 20 pc of the Sun. We have also analyzed the spectra of the white dwarfs to obtain effective temperatures and surface gravities.

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