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arXiv 2111.02016astro-ph.HE
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超大质量双星黑洞周围环双星吸积盘的演化:后牛顿流体力学与牛顿流体力学

Evolution of circumbinary accretion disk around supermassive binary black hole: post-Newtonian hydrodynamics versus Newtonian hydrodynamics

Wenshuai Liu

摘要:

利用FARGO3D非相对论流体动力学模拟研究了等质量超大质量双星黑洞周围吸积盘的演化。与以往的牛顿流体力学研究相比,本文采用了基于近区度规的后牛顿流体力学。在对比的牛顿调查,我们发现,有一个显着的差异,在后牛顿制度,形成的间隙周围的二进制吸积盘周围的二进制具有相同的质量是更广泛的后牛顿流体动力学比与牛顿流体动力学,是独立的磁盘粘度给定的流体动力学模拟运行约相同的因素倍的粘性时间尺度与不同的粘度。这可能会出现独特的可观察到的签名,在这样的双盘系统的连续辐射。

英文摘要:

We study the evolution of accretion disk around a supermassive binary black hole with equal mass using non-relativistic hydrodynamical simulations performed with FARGO3D. Compared with previous studies with the Newtonian hydrodynamics, here, we adopt the post-Newtonian hydrodynamics using the near zone metric of the binary black hole. In contrast to the Newtonian investigation, we find that there is a dramatic difference in the post-Newtonian regime, gap formed by the circumbinary accretion disk around the binary with equal mass is wider with the post-Newtonian hydrodynamics than that with the Newtonian hydrodynamics and is independent of disk viscosity given that hydrodynamical simulations are run for about the same factor times the viscous timescale associated with different viscosities. This may present unique observable signatures of the continuum emission in such binary-disk system.

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