SIMBAD references

1997A&A...327..721W - Astronomy and Astrophysics, volume 327, 721-724 (1997/11-2)

A search for planetary nebulae around hot white dwarfs.


Abstract (from CDS):

We have performed a search for old planetary nebulae around hot white dwarfs by direct Hα narrow-band imaging. The 16 examined objects are white dwarfs representing different spectral subtypes, comprising DA and various non-DA stars, among them being PG 1159 stars and white dwarfs exhibiting spectral signatures of ongoing mass-loss by ultra-hot winds. The search was entirely negative - with one possible exception: PG 0109+111, which is the most massive DO white dwarf known (M=0.74M) and among the hottest DOs (Teff=110000K). An asymmetric nebulosity extends about 5' from the star to the south-west, and there are hints that it extends even further out. If our detection is in fact the first definite case of a PN around a DO white dwarf it needs to be investigated by detailed spectroscopic observations.

Abstract Copyright:

Journal keyword(s): stars: evolution - stars: AGB and post-AGB - white dwarfs - planetary nebulae: general

Simbad objects: 22

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