Four magnetic DB white dwarfs discovered by the Hamburg/ESO survey

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dc.creatorReimers, D.
dc.creatorJordan, S.
dc.creatorBeckmann, V.
dc.creatorChristlieb, N.
dc.creatorWisotzki, L.
dc.date1998-07-14
dc.date.accessioned2026-07-07T02:27:24Z
dc.date.available2026-07-07T02:27:24Z
dc.descriptionWe 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 πcomponents of He I 5876 Angstroem and He I 4929 Angstroem can be identified unambiguously in their spectra, and the $σ^+$, $σ^-$ 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.
dc.description4 pages plus 2 Postscript figures. A&A Letters, in press
dc.identifierhttps://arxiv.org/abs/astro-ph/9807135
dc.identifierhttp://arxiv.org/abs/astro-ph/9807135
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/12674
dc.subjectAstrophysics
dc.titleFour magnetic DB white dwarfs discovered by the Hamburg/ESO survey
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