论文标题
M87中的EHT和气体动力学测量值：射流是否在PARSEC尺度上未对准？
Reconciling EHT and Gas Dynamics Measurements in M87: Is the Jet Misaligned at Parsec Scales?
论文作者
论文摘要
M87*的事件范围望远镜质量估计与恒星动力学质量估计一致，并且与气体动力学质量估计不一致，高达$2σ$。我们先前探索了一种新的气体动力学模型，该模型融合了次夸氏气体速度，可以原则上解释恒星和气体动力学质量估算中的差异。在本文中，我们将这种气体动力学模型扩展到还包括非平凡的磁盘高度，这也可能解决与亚较小速度速度成分无关的质量差异。通过将现有速度测量值和EHT质量估计结合在一起，我们对气盘倾斜度和kelplerian次级分数构成限制。这些约束要求将parsec尺度的电离气盘与milli-arcsecond Radio喷气机不一致至少为$ 11^{\ circ} $，更通常是$ 27^{\ circ} $。通过引入亚菌速度或较厚的磁盘对气体动力学模型进行修改会与无线电射流产生进一步的未对准。如果射流是在Blandford-Znajek型工艺中产生的，则黑洞的角动量与大型气体进料M87*的角动量分解。
The Event Horizon Telescope mass estimate for M87* is consistent with the stellar dynamics mass estimate, and inconsistent with the gas dynamics mass estimates by up to $2σ$. We have previously explored a new gas dynamics model that incorporated sub-Keplerian gas velocities that could in principle explain the discrepancy in the stellar and gas dynamics mass estimate. In this paper, we extend this gas dynamical model to also include non-trivial disk heights, which may also resolve the mass discrepancy independent of sub-Keplerian velocity components. By combining the existing velocity measurements and the EHT mass estimate, we place constraints on the gas disk inclination and sub-Kelplerian fraction. These constraints require the parsec-scale ionized gas disk be misaligned with the milli-arcsecond radio jet by at least $11^{\circ}$, and more typically $27^{\circ}$. Modifications to the gas dynamics model either by introducing sub-Keplerian velocities or thick disks produces further misalignment with the radio jet. If the jet is produced in a Blandford-Znajek-type process, the angular momentum of the black hole is decoupled with the angular momentum of the large scale gas feeding M87*.
