论文标题
EHT-NGEHT年龄的排放建模
Emission Modeling in the EHT-ngEHT Age
论文作者
论文摘要
这项工作提出了一种测试现象学动机发射过程的方法，该过程解释了事件地平线望远镜（EHT）成像的230 GHz源的通量和极化分布以及全球结构：Messier（M）87*和Sagittarius（SGR（SGR））A*。我们介绍了一般相对论磁化动力学（GRMHD）模拟的一些新型模型，以弥合很大程度上不确定的机制，通过这些机制，射流/积聚流量/黑洞（JAB）系统中的高能颗粒具有十亿度的温度和发射同步辐射。然后，“观察” JAB系统方法论将模拟分区以将不同的参数模型应用于由不同的等离子体物理学控制的区域 - 对跨越中央超级超级大型黑洞的数千个重力半径的模拟区域中使用一个参数化的进步。我们介绍了几类观察角依赖性的形态，并突出了分段建模和正电子效应的特征 - 包括疯狂/理智的二分法，其中极化图在疯狂的情况下以及在Sane案例中的固有极化似乎受到了固有极化的影响。如此产生的图像库涵盖了广泛的形态，这些形态正在等待开创性的EHT仪器及其更敏感，更高分辨率的下一代对应物NGEHT的发现。
This work proposes a methodology to test phenomenologically-motivated emission processes that account for the flux and polarization distribution and global structure of the 230 GHz sources imaged by the Event Horizon Telescope (EHT): Messier (M)87* and Sagittarius (Sgr) A*. We introduce to general relativistic magnetohydrodynamic (GRMHD) simulations some novel models to bridge the largely uncertain mechanisms by which high-energy particles in jet/accretion flow/black hole (JAB) system plasmas attain billion degree temperatures and emit synchrotron radiation. The "Observing" JAB Systems methodology then partitions the simulation to apply different parametric models to regions governed by different plasma physics -- an advance over methods where one parametrization is used over simulation regions spanning thousands of gravitational radii from the central supermassive black hole. We present several classes of viewing-angle dependent morphologies, and highlight signatures of piecewise modeling and positron effects -- including a MAD/SANE dichotomy in which polarized maps appear dominated by intrinsic polarization in the MAD case and by Faraday effects in the SANE case. The library of images thus produced spans a wide range of morphologies awaiting discovery by the groundbreaking EHT instrument and its yet more sensitive, higher resolution next-generation counterpart ngEHT.
