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Mass loss rates of Li-rich AGB/RGB stars

Published online by Cambridge University Press:  30 December 2019

Walter J. Macie Open the ORCID record for Walter J. Macie [Opens in a new window]  and
Roberto D. D. Costa
Walter J. Macie
Affiliation:
Astronomy Department, University of São Paulo, São Paulo, Brazil email: [email protected]
Roberto D. D. Costa
Affiliation:
Astronomy Department, University of São Paulo, São Paulo, Brazil email: [email protected]
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Abstract

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A sample of AGB/RGB stars with an excess of Li abundances is considered in order to estimate their mass loss rates. Our method is based on a correlation between the Li abundances and the stellar luminosity, using a modified version of the Reimers formula. We have adopted a calibration based on an empirical correlation between the mass loss rate and stellar parameters. We conclude that most Li-rich stars have lower mass loss rates compared with the majority of AGB/RGB stars, which show no evidences of Li enhancements, so that the Li enrichment process is probably not associated with an increased mass loss rate.

Keywords

stars: abundancesstars: mass lossstars: AGB and post-AGB
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S343: Why Galaxies Care About AGB Stars: A Continuing Challenge through Cosmic Time , August 2018 , pp. 458 - 459
Copyright
© International Astronomical Union 2019 

References

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