论文标题
从超级质量黑洞围绕超级伊德丁顿积聚的风和喷气的特性
The properties of wind and jet from a super-Eddington accretion flow around a supermassive black hole
论文作者
论文摘要
风和射流是AGN反馈的重要媒介，因此获得反馈研究的特性至关重要。在本文中，我们研究了从超级质量黑洞周围的磁性超级埃德丁顿积聚流中发射的风和射流的性能。为此，我们对磁性超级埃德丁顿积聚流进行了辐射磁水动力学模拟。然后，我们通过``虚拟粒子轨迹''方法分析了仿真数据，并获得了质量通量，poloidal和螺旋速度，以及质量频率加权的动量和风和射流的能量通量。发现质量通量比根据文献中广泛使用的时间平均流线方法获得的质量通量高2-6倍。发现风的动量通量大于射流的动量通量，而射流的总能量最多比风大3倍。这些结果类似于热吸积流的情况，这意味着风在AGN反馈中可能起着比喷气更重要的作用。风和射流的加速机制被分析并发现由洛伦兹力而不是辐射力控制。
Wind and jet are important medium of AGN feedback thus it is crucial to obtain their properties for the feedback study. In this paper we investigate the properties of wind and jet launched from a magnetized super-Eddington accretion flow around a supermassive black hole. For this aim, we have performed radiation magnetohydrodynamical simulation of a magnetically arrested super-Eddington accretion flows. We then have analyzed the simulation data by the ``virtual particle trajectory'' approach and obtained the mass flux, poloidal and toroidal velocities, and mass-flux-weighted momentum and energy fluxes of wind and jet. The mass flux is found to be 2-6 times higher than that obtained based on the time-averaged streamline method widely used in literature. The momentum flux of wind is found to be larger than that of jet, while the total energy flux of jet is at most 3 times larger than that of wind. These results are similar to the case of hot accretion flows and imply that winds likely play a more important role than jet in AGN feedback. The acceleration mechanism of wind and jet is analyzed and found to be dominated by Lorentz force rather than radiation force.
