A Search for Low-Mass POST AGB Stars
Abstract
An IRAS PSC sample of post-AGB sources with optical counterparts having spectral types earlier than M and with IR excesses is studied. Several subgroups are identified. Near-IR excesses are rather common for broad-lined A stars and for FG supergiants. Most FG supergiants are variable, and some are pulsating RV Tauri-like stars. Some new F supergiants with IR excesses are listed along with their Galactic latitudes, mean visual magnitudes, and information about the occurrence of photometric variability, near-IR excess, and H-alpha emission. The results show that HD 52961 is a very peculiar object, appearing to be very metal-deficient and carbon-rich.
- Publication:
-
From Miras to Planetary Nebulae: Which Path for Stellar Evolution?
- Pub Date:
- 1990
- Bibcode:
- 1990fmpn.coll..470W
- Keywords:
-
- Asymptotic Giant Branch Stars;
- Stellar Evolution;
- Stellar Mass;
- Astronomical Photometry;
- Cosmic Dust;
- Hertzsprung-Russell Diagram;
- Infrared Astronomy Satellite;
- Stellar Envelopes;
- Supergiant Stars;
- Astrophysics