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Astron. Astrophys. 326, 318-328 (1997)

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5. Conclusions

1. Molecular line observations of the carbon star V Hya show that there are three wind components in its circumstellar shell, flowing at speeds of 15, 45 and 200 [FORMULA].
2. V Hya is the first star still on the AGB found to be producing a very fast molecular wind.
3. Most of the mass of the circumstellar envelope is in the 45 [FORMULA] component, but most of the energy is in the 200 [FORMULA] wind.
4. The envelope is slightly resolved. The horns on the CO line profiles at [FORMULA] are the result of resolution and are spatially separated. The simplest geometry which explains the observed molecular line profiles is a flattened disk expanding at 15 [FORMULA], inclined to the line of sight, from whose poles the faster molecular winds are flowing.

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© European Southern Observatory (ESO) 1997

Online publication: April 20, 1998
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