Synergies between Asteroseismology and Three-dimensional Simulations of Stellar Turbulence

Turbulent mixing of chemical elements by convection has fundamental effects on the evolution of stars. The standard algorithm at present, mixing-length theory (MLT), is intrinsically local, and must be supplemented by extensions with adjustable parameters. As a step toward reducing this arbitrarines...

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Main Authors: Arnett, W. David, Moravveji, E.
Other Authors: Univ Arizona, Steward Observ
Language:en
Published: IOP PUBLISHING LTD 2017
Subjects:
Online Access:http://hdl.handle.net/10150/624377
http://arizona.openrepository.com/arizona/handle/10150/624377
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spelling ndltd-arizona.edu-oai-arizona.openrepository.com-10150-6243772017-06-25T03:00:33Z Synergies between Asteroseismology and Three-dimensional Simulations of Stellar Turbulence Arnett, W. David Moravveji, E. Univ Arizona, Steward Observ convection stars: general Turbulent mixing of chemical elements by convection has fundamental effects on the evolution of stars. The standard algorithm at present, mixing-length theory (MLT), is intrinsically local, and must be supplemented by extensions with adjustable parameters. As a step toward reducing this arbitrariness, we compare asteroseismically inferred internal structures of two Kepler slowly pulsating B stars (SPBs; M similar to 3.25M circle dot.) to predictions of 321D turbulence theory, based upon well-resolved, truly turbulent three-dimensional simulations that include boundary physics absent from MLT. We find promising agreement between the steepness and shapes of the theoretically predicted composition profile outside the convective region in 3D simulations and in asteroseismically constrained composition profiles in the best 1D models of the two SPBs. The structure and motion of the boundary layer, and the generation of waves, are discussed. 2017-02-14 Article Synergies between Asteroseismology and Three-dimensional Simulations of Stellar Turbulence 2017, 836 (2):L19 The Astrophysical Journal 2041-8213 10.3847/2041-8213/aa5cb0 http://hdl.handle.net/10150/624377 http://arizona.openrepository.com/arizona/handle/10150/624377 The Astrophysical Journal Letters en http://stacks.iop.org/2041-8205/836/i=2/a=L19?key=crossref.f1ddd6ee470c6ce2e75199750262cbf7 © 2017. The American Astronomical Society. All rights reserved. IOP PUBLISHING LTD
collection NDLTD
language en
sources NDLTD
topic convection
stars: general
spellingShingle convection
stars: general
Arnett, W. David
Moravveji, E.
Synergies between Asteroseismology and Three-dimensional Simulations of Stellar Turbulence
description Turbulent mixing of chemical elements by convection has fundamental effects on the evolution of stars. The standard algorithm at present, mixing-length theory (MLT), is intrinsically local, and must be supplemented by extensions with adjustable parameters. As a step toward reducing this arbitrariness, we compare asteroseismically inferred internal structures of two Kepler slowly pulsating B stars (SPBs; M similar to 3.25M circle dot.) to predictions of 321D turbulence theory, based upon well-resolved, truly turbulent three-dimensional simulations that include boundary physics absent from MLT. We find promising agreement between the steepness and shapes of the theoretically predicted composition profile outside the convective region in 3D simulations and in asteroseismically constrained composition profiles in the best 1D models of the two SPBs. The structure and motion of the boundary layer, and the generation of waves, are discussed.
author2 Univ Arizona, Steward Observ
author_facet Univ Arizona, Steward Observ
Arnett, W. David
Moravveji, E.
author Arnett, W. David
Moravveji, E.
author_sort Arnett, W. David
title Synergies between Asteroseismology and Three-dimensional Simulations of Stellar Turbulence
title_short Synergies between Asteroseismology and Three-dimensional Simulations of Stellar Turbulence
title_full Synergies between Asteroseismology and Three-dimensional Simulations of Stellar Turbulence
title_fullStr Synergies between Asteroseismology and Three-dimensional Simulations of Stellar Turbulence
title_full_unstemmed Synergies between Asteroseismology and Three-dimensional Simulations of Stellar Turbulence
title_sort synergies between asteroseismology and three-dimensional simulations of stellar turbulence
publisher IOP PUBLISHING LTD
publishDate 2017
url http://hdl.handle.net/10150/624377
http://arizona.openrepository.com/arizona/handle/10150/624377
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