Excitation of Turbulence in Protoplanetary Disks around Binary Stars

Accretion disks around young binary stars are subject to strong forces exerted by the system components. Gas–dynamical interactions excite strong non-linear perturbations in the disk, which can give rise to turbulence. This study considers a mechanism for the excitation of turbulence based on the in...

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Bibliographic Details
Published inAstronomy reports Vol. 61; no. 12; pp. 1031 - 1037
Main Authors Kurbatov, E. P., Sytov, A. Yu, Bisikalo, D. V.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.12.2017
Springer Nature B.V
Subjects
Accretion disks
Astronomy
Binary stars
Computational fluid dynamics
Excitation
Flow stability
Instability
Mathematical models
Numerical models
Observations and Techniques
Physics
Physics and Astronomy
Planet formation
Protoplanetary disks
Protoplanets
Turbulence
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Summary:Accretion disks around young binary stars are subject to strong forces exerted by the system components. Gas–dynamical interactions excite strong non-linear perturbations in the disk, which can give rise to turbulence. This study considers a mechanism for the excitation of turbulence based on the instability of non-linear waves in a rotating flow. It is shown that the spectrum of non-linear perturbations excited in the inner part of the disk leads to turbularization of the flow. Estimates of the Shakura–Syunyaev index, α ∼ 0.01−0.05, are obtained for use in numerical models of accretion disks.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
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content type line 14
ISSN:1063-7729
1562-6881
DOI:10.1134/S1063772917120058