论文标题
部分可观测时空混沌系统的无模型预测
The Accretion flow in M87 is really MAD
论文作者
论文摘要
宇宙中大多数星系中的超级黑洞都由热积聚流动。理论分析和数值模拟都表明，根据磁化程度，黑洞热积聚流量分为两种模式，即理智（标准和正常进化）和MAD（磁性停滞的磁盘）。这是一个重要的问题，即单个来源中的热积聚在现实，理智或疯狂中应属于哪种模式。此问题已经在以前的一些作品中进行了调查，但它们都遭受了各种不确定性的困扰。通过在{m87}中2、5和8 GHz沿着射流沿着距黑洞的各个距离，以及三维一般的相对性磁性磁性磁性的数值模拟，在sane和mad的范围内，在{m87}时使用{m87} {m87}}中的测得的旋转度量值值，在2、5和8 GHz中沿着射流沿着射流的各个距离，我们在sane和mad sane中的良好模型，我们显示出良好的旋转量，我们在既有旋转率，又在良好的旋转值，我们在既一致的旋转值因此，排除了旋转度量超过两个数量级的旋转度量。
The supermassive black holes in most galaxies in the universe are powered by hot accretion flows. Both theoretical analysis and numerical simulations have indicated that, depending on the degree of magnetization, black hole hot accretion flow is divided into two modes, namely SANE (standard and normal evolution) and MAD (magnetically arrested disk). It has been an important question which mode the hot accretion flows in individual sources should belong to in reality, SANE or MAD. This issue has been investigated in some previous works but they all suffer from various uncertainties. By using the measured rotation measure values in the prototype low-luminosity active galactic nuclei in {M87} at 2, 5, and 8 GHz along the jet at various distances from the black hole, combined with three dimensional general relativity magnetohydrodynamical numerical simulations of SANE and MAD, we show in this paper that the predicted rotation measure values by MAD are well consistent with observations, while the SANE model overestimates the rotation measure by over two orders of magnitude thus is ruled out.
