在事件视界尺度上模拟黑洞的偏振辐射
Modelling the polarised emission from black holes on event horizon-scales
摘要：
接下来的VLBI观测将在事件视界尺度上解析附近的超大质量黑洞，最著名的是人马座A* 和M87。最近用事件视界望远镜对人马座A* 的观测揭示了视界尺度的结构。因此，对背洞"阴影”的探测和测量有望使天体物理学上黑洞的存在得到直接验证。虽然阴影的理论描述很简单，但它的观测外观在很大程度上取决于周围高度湍流的吸积流的性质。我们介绍了一个新的极化广义相对论辐射转移代码，\texttt{BHOSS}，它精确地解决了在任意强引力环境中的极化辐射转移方程，提供物理上真实的图像天体物理黑洞的事件视界尺度，以及还提供洞察周围的吸积流环境的基本属性和性质。
英文摘要：
Upcoming VLBI observations will resolve nearby supermassive black holes, most notably Sagittarius A* and M87, on event horizon-scales. Recent observations of Sagittarius A* with the Event Horizon Telescope have revealed horizon-scale structure. Accordingly, the detection and measurement of the back hole ``shadow" is expected to enable the existence of astrophysical black holes to be verified directly. Although the theoretical description of the shadow is straightforward, its observational appearance is largely determined by the properties of the surrounding accretion flow, which is highly turbulent. We introduce a new polarised general-relativistic radiative transfer code, \texttt{BHOSS}, which accurately solves the equations of polarised radiative transfer in arbitrary strong-gravity environments, providing physically-realistic images of astrophysical black holes on event horizon-scales, as well as also providing insight into the fundamental properties and nature of the surrounding accretion flow environment.
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