What's next for Event Horizon Telescope after its black hole pictures?

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What's next for Event Horizon Telescope after its black hole pictures?
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After releasing a picture of the Milky Way’s black hole, the Event Horizon Telescope researchers now want to make a movie

so far, deeper analysis will give us another check on how that theory might break down in the extreme areas around black holes. “It should give us a hint, at some point, of maybe something different than how we formulate gravity with the theory of general relativity right now,” said Özel. “We don’t see a crack in that theory yet.”

Finally, another major goal of the EHT collaboration is to make videos of Sgr A* and M87* as the material around them moves and changes over time. “We tried to use the data that we got to try to recover a movie,” said EHT researcherat the California Institute of Technology. Although they do have some data they could use, there currently isn’t enough of it to make movies of the black holes, she said.

The additional telescopes recently added to the array should help with that. These will take data in multiple wavelengths, which will increase the resolution of the images and could produce colour pictures – the images that have been released so far have had colour added to indicate brightness. So far, these two black holes are the only ones that we know of that can be imaged by EHT with high enough resolution to see their silhouettes against the light of the hot plasma around them – Sgr A* because of its proximity to Earth, and M87* because of its colossal size. Ongoing work is trying to identifythe researchers could observe and compare to the two we have seen so far.

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