Focusing of non-linear eccentric waves in astrophysical discs
Focusing of non-linear eccentric waves in astrophysical discs
复制标题
天体物理圆盘中非线性偏心波的聚焦
DOI:
10.1093/mnras/stz1731
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发表时间:
2019
影响因子:
4.8
通讯作者:
Lynch E
中科院分区:
文献类型:
--
作者:
Lynch E
We develop a fully non-linear approximation to the short-wavelength limit of eccentric waves in astrophysical discs, based on the averaged Lagrangian method of Whitham. In this limit there is a separation of scales between the rapidly varying eccentric wave and the background disc. Despite having small eccentricities, such rapidly varying waves can be highly non-linear, potentially approaching orbital intersection, and this can result in strong pressure gradients in the disc. We derive conditions for the steepening of non-linearity and eccentricity as the waves propagate in a radially structured disc in this short-wavelength limit and show that the behaviour of the solution can be bounded by the behaviour of the WKB solution to the linearized equations.
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DOI:
10.3847/1538-4357/ab010c
发表时间:
2018
期刊:
The Astrophysical Journal
影响因子:
--
作者:
Wing;A. Dempsey;Y. Lithwick
通讯作者:
Y. Lithwick
DOI:
10.1086/319398
发表时间:
2000
期刊:
The Astronomical Journal
影响因子:
--
作者:
S. Tremaine
通讯作者:
S. Tremaine
DOI:
--
发表时间:
2007
期刊:
影响因子:
--
作者:
W. K. M. Rice;P. Armitage;D. F. Hogg
通讯作者:
D. F. Hogg
影响因子:
4.8
作者:
J. Teyssandier;G. Ogilvie
通讯作者:
G. Ogilvie
DOI:
10.3847/2041-8213/ab3a4a
发表时间:
2019
期刊:
The Astrophysical Journal Letters
影响因子:
--
作者:
Wing;A. Dempsey;Y. Lithwick
通讯作者:
Y. Lithwick