Younsi, Z; Porth, O; Mizuno, Y; Fromm, CM; Olivares, H; (2019) Modelling the polarised emission from black holes on event horizon-scales. In: Proceedings of the International Astronomical Union. Cambridge (In press).

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Abstract

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 veri�ed directly. Although the theoretical description of the shadow is straightforward, its observational appearance is largely determined by the properties of the surrounding accretion ow, which is highly turbulent. We introduce a new polarised generalrelativistic radiative transfer code, 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 ow environment.

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