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O-Star Wind Variability in the Ultraviolet and Optical Range

Published online by Cambridge University Press:  12 April 2016

Lex Kaper
Lex Kaper*
Affiliation:
Astronomical Institute, University of Amsterdam, Kruislaan 403, 1098 Amsterdam, The Netherlands

Abstract

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Variability is a fundamental property of O-star winds. One of the major breakthroughs in this field of research has been the recognition that wind variability is cyclical in nature. This suggests that stellar rotation is an important piece in the unsolved puzzle of the wind-variability mechanism. The current idea is that Corotating Interacting Regions (CIRs) are responsible for the observed wind variability. These conclusions are based on detailed and extensive monitoring of ultraviolet resonance lines formed throughout the stellar wind, and subordinate lines like Hα which probe the regions close to the star.

Type
Section III Variable Winds
Information
International Astronomical Union Colloquium , Volume 169: Variable and Non-spherical Stellar Winds in Luminous Hot Stars , 1999 , pp. 193 - 200
Copyright
Copyright © Springer-Verlag 1999

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