论文标题
恒星质量黑洞的公共 - 内玻璃动力学：一般相对论模拟
Common-envelope Dynamics of a Stellar-mass Black Hole: General Relativistic Simulations
论文作者
论文摘要
目的是为在红色超级恒星的恒星信封中移动时，遇到的“公共 - 层”场景中质量积聚和阻力速率的世俗行为的目的更加准确，更现实，我们已经在不陈述的黑洞中逐渐流动了一个媒介，但我们已经将媒介的媒介变成了一个媒介，但要逐渐移动一个媒介。模拟表明，超音速运动始终迅速达到固定状态，并且在流动的下游部分产生了冲击锥。在没有密度梯度的情况下，我们恢复了在众所周知的粘合 - hoyle-lyttleton积聚问题中已经观察到的现象学，超级 - 埃德丁顿质量吸积率和一个冲击锥，其轴稳定地与运动方向排列。但是，随着密度梯度变得更强大，积聚速率也会增加，并且冲击锥逐渐稳定地向运动方向拖动。有了足够大的梯度，电击轴轴可以与方向正交，甚至可以在最大密度梯度的情况下移动在流动的上游区域。加上吸积流的现象学方面，我们还量化了质量和动量的增生速率。已经发现了简单的分析表达式，即质量，动量，阻力和Bremsstrahlung的发光度的增值速率，所有这些都已用于二进制系统的天体进化的天体物理模型中，该二进制系统经历了常见的Envelope Evolution ...
With the goal of providing more accurate and realistic estimates of the secular behavior of the mass accretion and drag rates in the "common-envelope" scenario encountered when a black hole or a neutron star moves in the stellar envelope of a red supergiant star, we have carried out the first general relativistic simulations of the accretion flow onto a nonrotating black hole moving supersonically in a medium with regular but different density gradients. The simulations reveal that the supersonic motion always rapidly reaches a stationary state and it produces a shock cone in the downstream part of the flow. In the absence of density gradients we recover the phenomenology already observed in the well-known Bondi--Hoyle--Lyttleton accretion problem, with super-Eddington mass accretion rate and a shock cone whose axis is stably aligned with the direction of motion. However, as the density gradient is made stronger, the accretion rate also increases and the shock cone is progressively and stably dragged toward the direction of motion. With sufficiently large gradients, the shock-cone axis can become orthogonal to the direction, or even move in the upstream region of the flow in the case of the largest density gradient. Together with the phenomenological aspects of the accretion flow, we have also quantified the rates of accretion of mass and momentum onto the black hole. Simple analytic expressions have been found for the rates of accretion of mass, momentum, drag force, and bremsstrahlung luminosity, all of which have been employed in the astrophysical modelling of the secular evolution of a binary system experiencing a common-envelope evolution...
