All Questions
Tagged with event-horizon-telescope general-relativity
4
questions
9
votes
2
answers
926
views
Why is the ring in this simulation of Sgr A* off center?
In the recent releases of images of Sgr A*, simulated versions of what they expected were included along side the actual images they were able to get. What confuses me about these simulated images (...
- 3,404
9
votes
1
answer
2k
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Doubt regarding size and shape of black hole images published by the Event Horizon Telescope (EHT)
The recent publications of the images of black hole shadow by the Event Horizon Telescope collaboration prompts us to study black hole images in more details. According to the no-hair theorem, the ...
- 323
3
votes
1
answer
280
views
How can light circle a black hole one or more times and then escape again? [duplicate]
The shadow that is cast by a black hole was beautifully captured by the event horizon telescope. A concentration of light in the photon sphere around the hole (adjacent to the event horizon) ...
3
votes
1
answer
403
views
Do the "schwarzschild metric" or the "isotropic metric" fit the Event Horizon telescope data on Messier 87 better?
The "Schwarzschild solution" in "Schwarzschild metric" looks like:
$$\text -c^2d\tau^2=-\left(1-\frac{2GM}{rc^2}\right)c^2dt^2+\left(1-\frac{2GM}{rc^2}\right)^{-1}dr^2+r^2(d\theta^2+\sin^2\theta\,d\...
- 457