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Observations of outflows of massive stars

Published online by Cambridge University Press:  16 August 2023

Andrea Mehner Open the ORCID record for Andrea Mehner [Opens in a new window]
Andrea Mehner*
Affiliation:
ESO - European Organisation for Astronomical Research in the Southern Hemisphere, Alonso de Cordova 3107, Vitacura, Santiago de Chile, Chile
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Abstract

Mass loss plays a key role in the evolution of massive stars and their environment. High mass-loss events are traced by complex circumstellar ejecta and intricate line profiles across the upper Hertzsprung-Russell diagram for massive stars in different evolutionary stages. The basic physics of radiation-driven stellar wind for hot stars is well understood. However, the driving mechanisms and related instabilities for their enhanced mass-loss episodes and the driving mechanisms for the mass loss of cool stars are still debated. In this review, the mass-loss characteristics and the possible mechanisms will be surveyed for an observational set of prominent massive stellar populations that experience outflows, strong stellar winds, and periods of enhanced and eruptive mass loss; massive young stellar objects, OB-type stars, red supergiants, warm hypergiants, luminous blue variables, and Wolf-Rayet stars.

Keywords

stars: emission-lineBestars: evolution(stars:) circumstellar matterstars: windsoutflowsstars: variables: other
Type
Contributed Paper
Information
Proceedings of the International Astronomical Union , Volume 17 , Symposium S370: Winds of Stars and Exoplanets , August 2021 , pp. 37 - 55
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© The Author(s), 2023. Published by Cambridge University Press on behalf of International Astronomical Union

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