Question

This problem requires you to read the following recently published scientific article:
First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole.

Answer following questions related to this article:
(a) Calculate the photon capture radius and the Schwarzschild radius of M87∗
(in AU).
(b) Why was it not possible for previous telescopes to take such a picture of the black hole?
(c) Describe the components and functionality of the event horizon telescope.
(d) Explain the two algorithms used to reconstruct the image from the telescope data.
(e) What parameters were required for the GRMHD simulations to generate an image?
(f) Explain the physical origins of the features in Figure 3 (central dark region, ring, shadow).
(g) How can the image resolution be increased in future observations?
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Answer 1

Answer:

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