论文标题
发射结构化喷气机的疯狂积聚磁盘可以解释GRB和AGN引擎吗？磁性被捕的积聚磁盘在应用于GRB和AGN发动机时启动结构化喷气机
Can MAD accretion disks launching structured jets explain both GRB and AGN engines? Magnetically arrested accretion disks launching structured jets in application to GRB and AGN engines
论文作者
论文摘要
我们探索相对论喷气机的形成，能量和几何形状以及其中央发动机的变异性。我们快速和缓慢旋转黑洞，并将模拟介绍到主动星系中心（AGN）中心和伽马射线爆发（GRB）发动机。假定结构化的喷气机以考虑到整个质量范围内高能源的发射特性，这是由GRBS中的恒星质量黑洞和AGN中的超级质量黑洞发射的。它们的活跃核心包含磁化磁盘和Kerr Black Hole的旋转，为喷射发射提供了一种机制。如果磁性被磁性逮捕（疯狂），此过程最有效。在这种模式下，从发动机发射的喷气机的调制与以最小时间和空间尺度运行的积聚流中的内部不稳定性有关。由于这些尺度与光线涂线和黑洞重力半径有关，因此预计喷气风险连接的通用模型将随着黑洞质量的比例扩展。我们通过KERR公制中的MAD积聚的3D GR MHD模拟研究了喷射磁盘连接。我们通过傅立叶分析来量化磁盘的可变性。我们发现，演化受到发动机的物理参数的控制，例如黑洞旋转和磁盘尺寸及其磁化，我们将场景应用于AGN和GRB类中的典型源类型。我们发现，疯狂的场景适用于AGN发动机，并支持持续的喷气发射。它也可以应用于GRB，因为它给出了与观察结果大致一致的可变性模式。但是，在某些情况下，强磁场可能会导致喷射淬火，并且发现这种效果主要对于GRB喷气机很重要。我们推测它可能与GRB发动机的磁性驱动风的强度有关。
We explore the formation, energetics, and geometry of relativistic jets along with the variability of their central engine. We study both fast and slowly rotating black holes and address our simulations to active galaxy (AGN) centers and gamma ray burst (GRB) engines. The structured jets are postulated to account for emission properties of high energy sources across the mass scale, launched from stellar mass black holes in GRBs and from supermassive black holes in AGNs. Their active cores contain magnetized accretion disks and rotation of the Kerr black hole provides a mechanism for jet launching. This process works most effectively if the mode of accretion is magnetically arrested (MAD). In this mode, the modulation of jets launched from the engine is related to internal instabilities in the accretion flow that operate on smallest time and spatial scales. As these scales are related to the light-crossing time and the black hole gravitational radius, the universal model of jet-disk connection is expected to scale with the black hole mass. We investigate the jet-disk connection by means of 3D GR MHD simulations of the MAD accretion in Kerr metric. We quantify the variability of the disk by means of a Fourier analysis. We found that the evolution is governed by the physical parameters of the engine such as the black hole spin and disk size as well as its magnetization, and we applied our scenarios to typical types of sources in AGN and GRB classes. We found that the MAD scenario is applicable to AGN engines and supports persistent jet emission. It can also be applied to GRBs, as it gives the variability pattern roughly consistent with observations. However, in some cases, strong magnetic fields may lead to jet quenching, and this effect is found to be important mainly for GRB jets. We speculate that it may be related to the strength of magnetically driven winds from the GRB engines.
