中文

吸积盘垂直共振的非线性理论

天体物理学 2009-11-07 v1

摘要

吸积盘与轨道平面与共面的巨型伴侣之间的相互作用的一个重要且被广泛忽视的方面是垂直潮汐力的分量。正如 Lubow 所示,吸积盘对垂直驱动的响应在特定半径处为共振,此时会施加局部扭矩,并可能发射压缩波(p 模)。虽然这些垂直共振弱于相应的 Lindblad 共振,但二体星中的 m=2 内垂直共振通常位于环形吸积盘的潮汐截断半径内。在本文中,我发展了垂直共振的一般理论,允许响应的非线性,以及通过辐射阻尼和湍流黏性进行的耗散。问题被简化为一个具有两个实参数的通用非线性常微分方程。 presented to illustrate the non-linear saturation of the resonance and the effects of dissipation. It is argued that the m=2 inner vertical resonance is unlikely to truncate the disc in cataclysmic variable stars, but contributes to angular momentum transport and produces a potentially observable non-axisymmetric structure.

关键词

引用

@article{arxiv.astro-ph/0112443,
  title  = {A non-linear theory of vertical resonances in accretion discs},
  author = {G. I. Ogilvie},
  journal= {arXiv preprint arXiv:astro-ph/0112443},
  year   = {2009}
}

备注

17 pages, 3 figures, to be published in MNRAS