We present high-resolution VLT spectra of a new helium-rich DO white dwarf ( HE1314 $ + $ 0018 ) and a new PG1159 star ( HE1429 $ - $ 1209 ) , which we identified in the ESO SPY survey .
We performed NLTE model atmosphere analyses and found that the PG1159 star is a low-gravity , extremely hot ( T _ { \mathrm { eff } } =160 000 K , \log g =6 ) star , having a carbon-helium dominated atmosphere with considerable amounts of oxygen and neon ( He=38 % , C=54 % , O=6 % , Ne=2 % by mass ) .
It is located within the planetary nebula nuclei instability strip , hence , future searches for an associated PN as well as for stellar pulsations might be successful .
The DO white dwarf is a unique object .
From the relative strength of neutral and ionized helium lines we found T _ { \mathrm { eff } } \approx 60 000 K , however , the He ii lines are extraordinarily strong and can not be fitted by any model .
Similar problems were encountered with hot subdwarfs and white dwarfs showing signatures of a super-hot wind .
The reason is unknown .