Planet-disc interaction in laminar and turbulent discs
Planet-disc interaction in laminar and turbulent discs
复制标题
层流盘和湍流盘中的行星盘相互作用
DOI:
10.1051/0004-6361/201730668
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发表时间:
2017
期刊:
影响因子:
--
通讯作者:
Picogna
中科院分区:
文献类型:
--
作者:
Picogna
In weakly ionised discs turbulence can be generated through the vertical shear instability (VSI). Embedded planets are affected by a stochastic component in the torques acting on them, which can impact their migration. In this work we study the interplay between a growing planet embedded in a protoplanetary disc and the VSI turbulence. We performed a series of 3D hydrodynamical simulations for locally isothermal discs with embedded planets in the mass range from 5 to 100 Earth masses. We study planets embedded in an inviscid disc that is VSI unstable, becomes turbulent, and generates angular momentum transport with an effectiveα= 5 × 10-4. This is compared to the corresponding viscous disc using exactly thisα-value. In general we find that the planets have only a weak impact on the disc turbulence. Only for the largest planet (100M⊕) does the turbulent activity become enhanced inside of the planet. The depth and width of a gap created by the more massive planets (30,100M⊕) in the turbulent disc equal exactly that of the corresponding viscous case, leading to very similar torque strengths acting on the planet, with small stochastic fluctuations for the VSI disc. At the gap edges vortices are generated that are stronger and longer-lived in the VSI disc. Low mass planets (withMp≤ 10M⊕) do not open gaps in the disc in either case, but generate for the turbulent disc an overdensity behind the planet that exerts a significant negative torque. This can boost the inward migration in VSI turbulent discs well above the Type I rate. Owing to the finite turbulence level in realistic 3D discs the gap depth will always be limited and migration will not stall in inviscid discs.
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DOI:
10.1051/0004-6361/201527716
发表时间:
2016
期刊:
arXiv: Earth and Planetary Astrophysics
影响因子:
--
作者:
M.H.R.
通讯作者:
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DOI:
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发表时间:
2016-10
期刊:
The Astrophysical Journal
影响因子:
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通讯作者:
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DOI:
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发表时间:
2012-03
影响因子:
33.3
作者:
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通讯作者:
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DOI:
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发表时间:
2014
期刊:
影响因子:
--
作者:
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通讯作者:
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DOI:
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发表时间:
2003
期刊:
影响因子:
--
作者:
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通讯作者:
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