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Massive star interiors revealed by gravity wave asteroseismology and high-resolution spectroscopy

Published online by Cambridge University Press:  29 August 2024

Dominic M. Bowman Open the ORCID record for Dominic M. Bowman [Opens in a new window]
Dominic M. Bowman*
Affiliation:
Institute of Astronomy, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium
*
email: [email protected]
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Abstract

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In recent years, it has been discovered that massive stars commonly exhibit a non-coherent form of variability in their light curves referred to as stochastic low frequency (SLF) variability. Various physical mechanisms can produce SLF variability in such stars, including stochastic gravity waves excited at the interface of convective and radiative regions, dynamic turbulence generated in the near-surface layers, and clumpy winds. Gravity waves in particular are a promising candidate for explaining SLF variability as they can be ubiquitously generated in main sequence stars owing to the presence of a convective core, and because they provide the large-scale predominantly tangential velocity field required to explain macroturbulence in spectral line fitting. Here, I provide an overview of the methods and results of studying SLF variability in massive stars from time series photometry and spectroscopy.

Keywords

stars: early-typestars: oscillations (including pulsations)stars: interiorswaves
Type
Contributed Paper
Information
Proceedings of the International Astronomical Union , Volume 18 , Symposium S361: Massive Stars Near and Far , May 2022 , pp. 376 - 381
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Copyright
© The Author(s), 2024. Published by Cambridge University Press on behalf of International Astronomical Union

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