Questions tagged [event-horizon-telescope]
Questions about the Event Horizon Telescope, or EHT.
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Why not take a picture of a closer black hole?
There are closer galaxies than Messier 87 for sure, even ours! It sparked my curiosity that they went with one 53 million light years away. Is there a reason for this?
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Why are there uneven bright areas in this photo of black hole?
In the recently released photo of a black hole shown above, which was created by using data from EHT, why is the lower region brighter than the one above? Is it because of the rotation of the ...
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Why didn't the Event Horizon Telescope team mention Sagittarius A*?
At the press conference this morning, the Event Horizon Telescope team didn't say much about Sagittarius A*, which was the target many of us have been waiting for.
Is there any explanation anywhere ...
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What else could the Event Horizon Telescope Observe?
The Event Horizon Telescope was made possible in order to observe the details of supermassive black holes. This took a huge amount of work installing extra telescopes and developing the hardware and ...
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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 (...
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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 ...
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Would Hubble Space Telescope improve black hole image observed by EHT if it joined array of telesopes?
My question is related to black hole image released in April. As far as I understand idea of EHT, it joins observations from multiple locations to work like one telescope with radius that is equal to ...
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Is this image of Sgr A* correctly labelled?
This BBC article contains this "schematic description" of the EHT Sgr A* image:
The source is described only as "EHT Collaboration" and I haven't been able to find the original ...
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How can the Event Horizon Telescope image Sgr A* when it's not visible from all sites at one time?
I went to https://eventhorizontelescope.org/array and read about the ten sites listed as part of the EHT, I have a mashed-up screen shot of them below.
I made a little script also shown below with ...
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Is there any work underway to push the long baseline capabilities of the Event Horizon Telescope to sub-millimeter wavelengths?
The Max Planck Institute for Radio Astronomy's press release Something is Lurking in the Heart of Quasar 3C 279; First Event Horizon Telescope Images of a Black-Hole Powered Jet shows a stunning ...
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Can the Event Horizon Telescope been used to find intergalactic distances?
Now that we have the Event Horizon Telescope (EHT), why can't we just guess and check intergalactic distances by changing the EHT's focal length? For instance why don't we take another picture of M87,...
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Is there any update on the Availability of Event Horizon Telescope Images?
There has been no news on the obvious public channels from the EHT project since last (Northern) summer. Does anyone have more information on when any results from the April 2017 run might be released?...
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In terms of results, how similar is a bunch of telescopes across the globe to an Earth-sized telescope?
The Event Horizon Telescope emulates an Earth-sized telescope by syncing a bunch of radio telescopes across the planet to do take pictures with a small enough angular resolution to take pictures of a ...
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Would the Event Horizon Telescope be able to produce a superior image of Betelgeuse?
Current images of Betelgeuse are already amazing, but I was wondering if the EHT could be able to make a significantly better image, given that Betelgeuse is pretty big and pretty bright?
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Could images of (very) nearby targets be recovered from Event Horizon Telescope data?
Reading this question I was struck by the fact that the "pointing" of an interferometer is effectively done in the correlator, at least within the common field of view of all the telescopes, which is ...
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