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

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 cur...

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Published in:Proceedings of the International Astronomical Union 2022-05, Vol.18 (S361), p.194-196
Main Authors: Rubio-Díez, M. M., Sundqvist, J. O., Najarro, F., Traficante, A., Puls, J., Calzoletti, L., Figer, D.
Format: Article
Language:English
Subjects:
Astronomical models
Massive stars
Neutrons
Photosphere
Poster Paper
Recipes
Stellar evolution
Supergiant stars
Wind
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container_issue S361
container_start_page 194
container_title Proceedings of the International Astronomical Union
container_volume 18
creator Rubio-Díez, M. M.
Sundqvist, J. O.
Najarro, F.
Traficante, A.
Puls, J.
Calzoletti, L.
Figer, D.
description 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.
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subjects Astronomical models
Massive stars
Neutrons
Photosphere
Poster Paper
Recipes
Stellar evolution
Supergiant stars
Wind
title Upper Mass-Loss Limits and Clumping in the Intermediate and Outer Wind Regions of OB stars
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