论文标题
通过自适应粒子分解解决巨大的黑洞二进制
Resolving massive black hole binaries evolution via adaptive particle-splitting
论文作者
论文摘要
为了能够预测引力波信号的合并速率和可能的电磁对应物，对大型黑洞二元与气态环境的相互作用的相互作用的研究至关重要。最近，由于这种相互作用而产生的二进制半轴轴的演变，并且仍然缺少明确的共识，这也是由于几个数值局限性，即固定的轨道二进制文件或在其电路光盘中由二元雕刻而成的空腔内部分辨率。我们在3D无网状密码Gizmo中使用固定的粒子分割，我们实现了超拉格朗日的分辨率，这使我们能够正确地解决腔体内的动力学，尤其是第一次围绕局部二元组成的圆盘围绕局部二元组成的圆盘，该圆盘被当地的等渗的气体循环液体环绕。我们表明，二进制轨道随着时间的流逝而腐烂而非常温暖的椎间盘，并且中间状态中相互作用的结果在盘式粘度中强烈强烈，因为这基本上调节了二进制组件周围的圆盘中包含的质量分数，以及由二元组成的分数。我们发现这两个数量之间的平衡，以确定二进制半轴轴是否会随着时间而减小。
The study of the interaction of a massive black hole binary with its gaseous environment is crucial in order to be able to predict merger rates and possible electromagnetic counterparts of gravitational wave signals. The evolution of the binary semi-major axis resulting from this interaction has been recently debated, and a clear consensus is still missing, also because of several numerical limitations, i.e. fixed orbit binaries or lack of resolution inside the cavity carved by the binary in its circumbinary disc. Using on-the-fly particle-splitting in the 3D meshless code gizmo, we achieve hyper-Lagrangian resolution, which allows us to properly resolve the dynamics inside the cavity, and in particular for the first time the discs that form around the two components of a live binary surrounded by a locally isothermal gaseous circumbinary disc. We show that the binary orbit decays with time for very cold and very warm discs and that the result of the interaction in the intermediate regime is strongly in uenced by the disc viscosity as this essentially regulates the fraction of mass contained in the discs around the binary components as well as the fraction that is accreted by the binary. We find the balance between these two quantities to determine whether the binary semi-major axis decreases with time.
