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Upper Mass-Loss Limits and Clumping in the Intermediate and Outer Wind Regions of OB stars

Published online by Cambridge University Press:  29 August 2024

M. M. Rubio-Díez Open the ORCID record for M. M. Rubio-Díez [Opens in a new window] ,
J. O. Sundqvist ,
F. Najarro ,
A. Traficante ,
J. Puls ,
L. Calzoletti  and
D. Figer
M. M. Rubio-Díez*
Affiliation:
Facultad de Ciencias, Universidad de Alcalá, Alcalá de Henares, Madrid, Spain Centro de Astrobiología, CSIC-INTA, Torrejón de Ardoz, Madrid, Spain
J. O. Sundqvist
Affiliation:
Instituut voor Sterrenkunde, KU Leuven, Leuven, Belgium
F. Najarro
Affiliation:
Centro de Astrobiología, CSIC-INTA, Torrejón de Ardoz, Madrid, Spain
A. Traficante
Affiliation:
IAPS-INAF, Roma, Italy
J. Puls
Affiliation:
Universitäts-Sternwarte München, München, Germany
L. Calzoletti
Affiliation:
IAPS-INAF, Roma, Italy
D. Figer
Affiliation:
Center for Detectors, Rochester Institute of Technology, Rochester, New York, USA
*
email: mmar.rubio@uah.es
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Abstract

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Mass-loss is a key parameter throughout the evolution of massive stars. In this work we probe the radial clumping stratification of OB stars in the intermediate and outer wind regions (r ≳ 2R*; r, radial distance to photosphere), derive upper limits for mass-loss rates, Ṁmax, and compare them to current theoretical mass-loss recipes implemented in evolutionary models. A key conclusion of our analysis regards the derived upper-limit mass-loss rates of B supergiants, independently of clumping, which calls for an urgent revision of the role recombination of iron-like elements plays in determining the mass-loss rates of objects that cross the bi-stability region, and a careful analysis of corresponding effects for stellar evolution models.

Keywords

stars: early-typestars: atmospheresstars: mass loss
Type
Poster Paper
Information
Proceedings of the International Astronomical Union , Volume 18 , Symposium S361: Massive Stars Near and Far , May 2022 , pp. 194 - 196
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Creative Commons
Creative Common License - CCCreative Common License - BYCreative Common License - NCCreative Common License - ND
This is an Open Access article, distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives licence (https://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is unaltered and is properly cited. The written permission of Cambridge University Press must be obtained for commercial re-use or in order to create a derivative work.
Copyright
© The Author(s), 2024. Published by Cambridge University Press on behalf of International Astronomical Union

References

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Supplementary material: PDF

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