论文标题
NGC 1068核中超级质量黑洞的紧密二元二元二元二元二元二元的二元二元二元二元的动力学证据
Dynamical evidence of the sub-parsec counter-rotating disc for a close binary of supermassive black holes in the nucleus of NGC 1068
论文作者
论文摘要
它在\ ngc \中产生了一个难题，如何从$ 0.2 $降低到$ 7 \，$ pc的$ pc明确地检测到ALMA对分子气的观察结果，从而从$ 0.2 $ \ $ 7中保持了难题。 Upon further analysis of disc dynamics, we find that the Kelvin-Helmholtz (KH) instability (KHI) results in an unavoidable catastrophe of the disc developed at the interface between the reversely rotating parts, and demonstrate that a close binary of supermassive black holes provides tidal torques as the unique external sources to prevent the disc from the KH catastrophe.我们得出了不可避免的结论，即NGC 1068的中心必须有一个二进制黑洞，以防止其造成KH灾难。二进制文件由黑洞组成，分别为$ 0.1 \，$ PC与重力/VLTI观测值，总质量为$ 1.3 \ times 10^{7} \：m _ {\ odot} $，质量比为$ \ sim 0.3 $ 0.3 $从Angular Mommommmmommmmommmmomk budge budge估计。 KHI在速度界面上形成没有冷气的间隙，这与观察到的冷尘区域的间隙重叠。圆盘KHI的运动能量释放与观察到的无线电排放和$γ$ rays一致。这种二进制的时间尺度比通过重力波长得多得多，但是，KHI导致轨道角动量的有效消灭，并加快了二进制的融合，从而提供了解决“最终帕塞克问题”的长期问题的新范式。预计重力+/VLTI的未来观察结果将能够在本文中解决空间解决CB-SMBHS。
It arises a puzzle in \NGC\, how to secularly maintain the counter-rotating disc from $0.2$ to $7\,$pc unambiguously detected by recent ALMA observations of molecular gas. Upon further analysis of disc dynamics, we find that the Kelvin-Helmholtz (KH) instability (KHI) results in an unavoidable catastrophe of the disc developed at the interface between the reversely rotating parts, and demonstrate that a close binary of supermassive black holes provides tidal torques as the unique external sources to prevent the disc from the KH catastrophe. We are led to the inescapable conclusion that there must be a binary black hole at the center of NGC 1068, to prevent it from the KH catastrophe. The binary is composed of black holes with a separation of $0.1\,$pc from GRAVITY/VLTI observations, a total mass of $1.3\times 10^{7}\:M_{\odot}$ and a mass ratio of $\sim 0.3$ estimated from the angular momentum budge of the global system. The KHI gives rise to forming a gap without cold gas at the velocity interface which overlaps with the observed gap of hot and cold dust regions. Releases of kinematic energies from the KHI of the disc are in agreement with observed emissions in radio and $γ$-rays. Such a binary is shrinking with a timescale much longer than the local Hubble time via gravitational waves, however, the KHI leads to an efficient annihilation of the orbital angular momentum and speed up merge of the binary, providing a new paradigm of solving the long term issue of "final parsec problem". Future observations of GRAVITY+/VLTI are expected to be able to spatially resolve the CB-SMBHs suggested in this paper.
