Journal
ASTRONOMY & ASTROPHYSICS
Volume 518, Issue -, Pages -Publisher
EDP SCIENCES S A
DOI: 10.1051/0004-6361/201014633
Keywords
stars: AGB and post-AGB; stars: carbon; stars: evolution; stars: mass-loss; infrared: stars
Categories
Funding
- BMVIT (Austria)
- ESA-PRODEX (Belgium)
- CEA (France)
- CNES (France)
- DLR (Germany)
- ASI (Italy)
- CICYT (Spain)
- Austrian Science Fund FWF [P18939-N16]
- RO [I163-N16]
- Belgian Federal Science Policy Office of ESA
- Austrian Science Fund (FWF) [P18939] Funding Source: Austrian Science Fund (FWF)
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Detached circumstellar dust shells are detected around three carbon variables using Herschel-PACS. Two of them are already known on the basis of their thermal CO emission and two are visible as extensions in IRAS imaging data. By model fits to the new data sets, physical sizes, expansion timescales, dust temperatures, and more are deduced. A comparison with existing molecular CO material shows a high degree of correlation for TT Cyg and U Ant but a few distinct differences with other observables are also found.
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