Physics
Scientific paper
Jan 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005esasp.577..459t&link_type=abstract
In: Proceedings of the dusty and molecular universe: a prelude to Herschel and ALMA, 27-29 October 2004, Paris, France. Ed. by A
Physics
Stellar Envelopes, Co Lines
Scientific paper
We present the results of a multi-transition CO observational program conducted on a sample of AGB and post-AGB stars envelopes. Using new observations of the CO line at 691 GHz at the CSO, we have collected maps and single pointing observations of these envelope in 5 rotational transitions ranging from J=1-0 to J=6-5. Using a simplified version of the model of Bujarrabal et al. (1989), we have conducted a systematic modelling analysis using the whole set of CO data collected on a sample of 12 sources. Our modelling approach simultaneously fits all five transitions, taking into account the spatial information provided by the maps. We show that most AGBs data can be fitted using a single mass-loss rate, at least within the calibration uncertainties associated to the data collected at high frequencies. For some cases though, a change in the mass-loss rate history needs to be invoked to reconcile data at low and high-J respectively.
Bujarrabal Valentin
Phillips Thomas G.
Teyssier David
Yoshida Hajime
No associations
LandOfFree
CO line emission from circumstellar envelopes: towards higher-J transitions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with CO line emission from circumstellar envelopes: towards higher-J transitions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and CO line emission from circumstellar envelopes: towards higher-J transitions will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-900019