4 MAGNETIC DB WHITE-DWARFS DISCOVERED BY THE HAMBURG ESO SURVEY/

We report on seven peculiar faint blue stars found in the course of th e Hamburg/ESO survey (HES) which appear to be magnetic white dwarfs (W Ds) 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 20 MG, since the pi compon ents of He I 5876 Angstrom and He I 4929 Angstrom can be identified un ambiguously in their spectra, and the sigma(+), sigma(-) components ca n 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, u nidentifiable features have been found: HE 1043-0502, HE 0236-2656, an d HE 0330-0002. We argue that in all three of these stars HI can not b e responsible for the broad features, and He I most probably not for t he features in HE0236-2656 and HE 0330-0002, while it still remains po ssible that the broad features of HE 1043-0502 are due to He I.