We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Morphological classification of post-AGB stars.
- Authors
Manchado, Arturo; García-Hernández, D. Anibal; Villaver, Eva; de Massas, Jean Guironnet
- Abstract
We present a complete study of the morphology of post-Asymptotic Giant Branch (post-AGB) stars. The post-AGB stage is a very short evolutionary phase between the end of the AGB and the beginning of the Planetary Nebula (PN) stage (between 100 and 10,000 yrs). Post-AGB stars do not show variability and are not hot enough to fully ionize the hydrogen envelope. We have defined the end of the post-AGB phase and the beginning of the PN phase when the star has a temperature of 30000 K. Post-AGB stars have a circumstellar shell that is illuminated by the central stars or partially ionized. However, this circumstellar shell is too small to be resolved by ground-based observations. Thus, we have used the Hubble Space Telescope (HST) database to resolve these shells. 117 post-AGBs were found in this database. Here we present the preliminary results on their morphological classification and the correlation with the galactic latitude. Our preliminary results show that 38% of the sample are stellar-like (S), 31% bipolar (B), 12% multipolar (M) and 19% elliptical (E).
- Publication
Proceedings of the International Astronomical Union, 2011, Vol 7, Issue S283, p83
- ISSN
1743-9213
- Publication type
Article
- DOI
10.1017/S1743921312010745