SIMBAD references

1998A&A...338..651R - Astronomy and Astrophysics, volume 338, 651-660 (1998/10-2)

Spectral analysis of O(He)-type post-AGB stars.


Abstract (from CDS):

We present an analysis of two recently discovered, very hot hydrogen-deficient post-AGB stars of spectral type O(He), namely HS 1522+6615 and HS 2209+8229, by means of state-of-the-art NLTE model atmospheres based on new optical, UV, and X-ray observations. In the spectra of HS 1522+6615 we discovered a variability of the O Rco λ#3Å line complex on a time scale of few days. We also report on the discovery of a ring structure in the planetary nebula K1-27 which has an O(He)-type central star. We discuss how the group of O(He) stars fits in our picture of hydrogen-deficient post-AGB stellar evolution.

Abstract Copyright:

Journal keyword(s): stars: abundances - stars: evolution - stars: individual: HS 1522+6615 - stars: individual: HS 2209+8229 - stars: AGB and post-AGB - planetary nebulae: individual: K1-27

CDS comments: KS 292 = Hbg 292

Simbad objects: 41

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