Event Horizon Telescope Results Released Yesterday (April 10, 2019)

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Media Advisory: Press Conference on First Result from the Event Horizon Telescope
April 10, 15:00 CEST (13:00 UTC. In 8 days and 13 hours)
Livestream links are on that website.

The Event Horizon Telescope is a collection of radio telescopes all over the world which recorded data from the supermassive black hole in the center of the Milky Way. Combining the different data sets leads to a virtual telescope as large as Earth in terms of angular resolution - good enough to resolve the area directly around the black hole.

This article shows some simulations how it might look like.


Edit: The first image:

first_image_of_black_hole-jpg.jpg
 

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  • #2
berkeman
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Sorry, what are those simulations supposed to be showing? The SMBH eclipsing a star that is near the center of the MWG? Sorry if I'm missing the obvious...
 
  • #3
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The accretion disk around the black hole - gas and random other stuff orbiting the black hole closely. Brighter: More stuff.

There shouldn't be stars that close. We know one that has a periapsis speed of 3% the speed of light, but that is still outside the range the Event Horizon Telescope is interested in.
 
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  • #4
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Hmm, apparently it is "a groundbreaking result from the EHT".
 
  • #5
PAllen
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I guess this will expand the horizon of our knowledge...
 
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  • #7
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Is this just a first light/data release or is there some accompanying journal article?
 
  • #8
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I'm sure there will be at least a note, but probably a preprint or publication that comes with the press conference.
 
  • #10
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Kind of like the simulations...
Screenshot, poor quality.

blackhole.png


Edit: After some color corrections and so on. Left observation, right a theory prediction.

blackhole3.png
 
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  • #11
Orodruin
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M87 it is!
 
  • #15
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I wonder what the implications for Hawking radiation and other black hole theories are.

Also, there's just too much crap in the way to get a clear shot of Sagittarius right?
 
  • #16
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I wonder what the implications for Hawking radiation and other black hole theories are.
There would be no implications for Hawking radiation. A black hole this massive would essentially have a temperature of absolute zero.
 
  • #17
Drakkith
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Amazing picture!
 
  • #18
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So does this count as the first direct detection of black holes?
 
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  • #20
Drakkith
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Video from Veritasium on how to understand the image of a black hole:

 
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  • #22
russ_watters
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Cool picture, but what is actually new here? Haven't we already gotten pictures of matter falling into black holes? Is this just cooler because it's circular and black in the middle?
 
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  • #23
russ_watters
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Sorry for the dumb question (especially if it's already been addressed), but if they used 8 radio telescopes to form this image, where did the visible light colors come from?
Colorization. Somebody picked them.
 
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  • #24
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Video from Veritasium on how to understand the image of a black hole:

This is a very good explanation of what the black hole image shows.
 
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  • #25
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Colorization. Somebody picked them.
what is the visible spectrum image expected to look like? Based on the physics, I'm guessing almost identical to the radio image?
 
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