SIMBAD references

2006A&A...454L.103R - Astronomy and Astrophysics, volume 454, L103-106 (2006/8-1)

Mass-loss properties of S-stars on the AGB.

RAMSTEDT S., SCHOEIER F.L., OLOFSSON H. and LUNDGREN A.A.

Abstract (from CDS):

We have used a detailed non-LTE radiative transfer code to model new APEX CO(J=3->2) data, and existing CO radio line data, on a sample of 40 AGB S-stars. The derived mass-loss-rate distribution has a median value of 2x10–7M/yr, and resembles values obtained for similar samples of M-stars and carbon stars. Possibly, there is a scarcity of high-mass-loss-rate (≥10–5M/yr) S-stars. The distribution of envelope gas expansion velocities is similar to that of the M-stars, the median is 7.5km/s, while the carbon stars, in general, have higher gas expansion velocities. The mass-loss rate correlates well with the gas expansion velocity, in accordance with results for M-stars and carbon stars.

Abstract Copyright:

Journal keyword(s): stars: AGB and post-AGB - stars: circumstellar matter - stars: late-type - stars: mass-loss

Simbad objects: 40

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2019.12.06-19:30:35

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