Variability and evolution in various classes of post-AGB stars
ASTRONOMISCHE NACHRICHTEN, vol.328, no.8, pp.848-851, 2007 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 328 Issue: 8
- Publication Date: 2007
- Doi Number: 10.1002/asna.200710808
- Journal Name: ASTRONOMISCHE NACHRICHTEN
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Page Numbers: pp.848-851
- Keywords: stars : early-type, stars : super-giants, post-AGB stars, EXTREME HELIUM STAR, RADIAL PULSATION, WHITE-DWARFS, DEFICIENT, BINARY, SPECTRA
- Akdeniz University Affiliated: No
Abstract
We aim to compare properties of early-type post-asymptotic giant-branch (post-AGB) stars, including normal first-time B-type post-AGB stars, and extreme helium stars (EHes). Hipparcos photometry for 12 post-AGB stars and 7 EHe stars has been analyzed; 5 post-AGB stars are clearly variable. The Hipparcos data are not sufficiently sensitive to detect variability in any of the EHes.
We aim to compare properties of early-type post-asymptotic giant-branch (post-AGB) stars, including normal first-time B-type post-AGB stars, and extreme helium stars (EHes). Hipparcos photometry for 12 post-AGB stars and 7 EHe stars has been analyzed; 5 post-AGB stars are clearly variable. The Hipparcos data are not sufficiently sensitive to detect variability in any of the EHes.