  We present new FUV/UV observations of the DA white dwarf Wolf 1346 obtained
with the Hopkins Ultraviolet Telescope. The atmospheric parameters of this
object are estimated from a fit of model atmospheres to several optical spectra
to be Teff = 20000 K, log g = 7.90. From the optical spectrum this star is a
normal DA without any indications for chemical elements other than hydrogen.
The hydrogen line L beta, however, shows a very unusual shape, with a steep red
wing and two absorption features on this wing. The shape is reminiscent of the
effects of quasi-molecular line broadening, as observed in L alpha in cooler DA
white dwarfs. We show that this is indeed the correct explanation, by
identifying 4 quasi-molecular satellites caused through perturbations by the H+
ion (H2+ quasi-molecule). The steep red wing is caused by the exponential
decline of the line profile beyond the satellite most distant from the line
center at 1078 A.
