Four magnetic db white dwarfs discovered by the hamburg/eso survey
Jul, 19984 pages
Published in:
- Astron.Astrophys. 337 (1998) L13
e-Print:
- astro-ph/9807135 [astro-ph]
Report number:
- WE-DON'T-HAVE-OFFICIAL-REPORT-NUMBERS
View in:
Citations per year
Abstract: (arXiv)
We report on seven peculiar faint blue stars found in the course of the Hamburg/ESO survey (HES) which appear to be magnetic white dwarfs (WDs) with non-hydrogen spectra. We show in particular that four of them (HE 0338-3853, HE 0107-0158, HE 0026-2150, and HE 0003-5701) have He I lines split by magnetic fields of roughly 20MG, since the \pi components of He I 5876 Angstroem and He I 4929 Angstroem can be identified unambiguously in their spectra, and the , components can be identified in the spectra of two of these stars (HE 0338-3853 and HE 0003-5701). Besides GD 229, these are the first magnetic DB white dwarfs discovered so far. In addition, three further WDs with broad, unidentifiable features have been found: HE 1043-0502, HE 0236-2656, and HE 0330-0002. We argue that in all three of these stars H I can not be responsible for the broad features, and He I most probably not for the features in HE 0236-2656 and HE 0330-0002, while it still remains possible that the broad features of HE 1043-0502 are due to He I.References(5)
Figures(0)