Extended dust shells around carbon stars resolved by HIRAS
Abstract
We have examined forty-two carbon stars which show an excess emission at 60 and/or 100 mu m by applying maximum entropy image reconstruction techniques to the IRAS 60 mu m survey data. Thirteen stars are found to be extended in the reconstructed images. Four of them show a detached ring centered on the stellar position. In particular, U Ant may have a double detached dust shell. The implications of our results are discussed concerning the variation of mass loss on the AGB evolution.
- Publication:
-
In Nobeyema Solar Radio Observatory
- Pub Date:
- 1994
- Bibcode:
- 1994RpNRO....T....I
- Keywords:
-
- Carbon Stars;
- Cosmic Dust;
- Image Reconstruction;
- Infrared Imagery;
- Maximum Entropy Method;
- Satellite Imagery;
- Stellar Envelopes;
- Infrared Astronomy Satellite;
- Losses;
- Sky Surveys (Astronomy);
- Astrophysics