2007A&A...465..593S -
Astronomy and Astrophysics, volume 465, 593-601 (2007/4-2)
A critical test of empirical mass loss formulas applied to individual giants and supergiants.
SCHROEDER K.-P. and CUNTZ M.
Abstract (from CDS):
To test our new, improved Reimers-type mass-loss relation, given by Schroeder & Cuntz in 2005 (
2005ApJ...630L..73S), we take a look at the best studied galactic giants and supergiants - particularly those with spatially resolved circumstellar shells and winds, obtained directly or by means of a companion acting as a probing light source. Together with well-known physical parameters, the selected stars provide the most powerful and critical observational venues for assessing the validity of parameterized mass-loss relations for cool winds not driven by molecules or dust. In this study, star by star, we compare our previously published relation with the original Reimers relation (
1975MSRSL...8..369R), the Lamers relation (
1981ApJ...245..593L), and the two relations by de Jager and his group (
1988A&AS...72..259D;
1990A&A...231..134N). The input data, especially the stellar masses, have been constrained using detailed stellar evolution models. We find that only the relationship by Schroeder & Cuntz agrees, within the error bars, with the observed mass-loss rates for all giants and supergiants.
Abstract Copyright:
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Journal keyword(s):
methods: statistical - stars: general - stars: late-type - stars: mass-loss - stars: winds, outflows
Simbad objects:
12
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