Event Horizon Telescope ready to image black hole

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Event Horizon Telescope ready to image black hole

#1  Postby the_5th_ape » Feb 17, 2017 2:07 pm

Scientists believe they are on the verge of obtaining the first ever picture of a black hole.

They have built an Earth-sized "virtual telescope" by linking a large array of radio receivers - from the South Pole, to Hawaii, to the Americas and Europe.

There is optimism that observations to be conducted during 5-14 April could finally deliver the long-sought prize.

In the sights of the so-called "Event Horizon Telescope" will be the monster black hole at the centre of our galaxy.

http://www.bbc.com/news/science-environment-38937141
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Re: Event Horizon Telescope ready to image black hole

#2  Postby newolder » Feb 17, 2017 2:18 pm

See also: http://www.eventhorizontelescope.org

ETA from the link:
...
This new 1.3 mm VLBI detection confirms that short-wavelength VLBI of Sgr A* can and will be used to directly probe the event horizon of this black hole candidate: in short, Sgr A* is the right object, VLBI is the right technique, and this decade is the right time.
...
Last edited by newolder on Feb 18, 2017 11:51 am, edited 1 time in total.
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Re: Event Horizon Telescope ready to image black hole

#3  Postby DavidMcC » Feb 18, 2017 11:44 am

I can't find a link, but I'm pretty sure an image of this kind was made years ago, although it wasn't of Sagittarius A*, but of a more local, stellar black hole.

EDIT: On the other hand, it might have been only a simulation. :(
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Re: Event Horizon Telescope ready to image black hole

#4  Postby newolder » Apr 05, 2017 8:52 pm

The campaign to capture the first-ever image of a black hole has begun.

From today (April 5) through April 14, astronomers will use a system of radio telescopes around the world to peer at the gigantic black hole at the center of the Milky Way, a behemoth called Sagittarius A* (Sgr A*) that's 4 million times more massive than the sun.
...
Though the current observing campaign will be over soon, it will take a while for astronomers to piece together the images. For starters, so much information will be collected by the participating telescopes around the world that it will be physically flown, rather than transmitted, to the central processing facility at the Massachusetts Institute of Technology's Haystack Observatory.

Then, the data will have to be calibrated to account for different weather, atmospheric and other conditions at the various sites. The first results from the campaign will likely be published next year, EHT team members said.

more @ space.com link
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Re: Event Horizon Telescope ready to image black hole

#5  Postby newolder » Apr 07, 2017 12:03 pm

Katie Bouman's related TED talk.
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Re: Event Horizon Telescope ready to image black hole

#6  Postby tuco » Apr 07, 2017 4:47 pm

Oranges, Mick Jagger, discoball, giant elephant and puzzle :) Very cool.
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Re: Event Horizon Telescope ready to image black hole

#7  Postby DavidMcC » May 12, 2017 12:14 pm

The space.com silmulation is obviously based on the assumption that Saggitarius A* is not feeding on any gas. However, AFAIK, it started doing just that a year or so ago, so it will not look quite as shown in the picture, I suspect.
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Re: Event Horizon Telescope ready to image black hole

#8  Postby newolder » Feb 04, 2019 12:36 pm

Update on the data analysis: Why Don’t We Have a Photo of a Black Hole Yet?

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Re: Event Horizon Telescope ready to image black hole

#9  Postby zulumoose » Feb 04, 2019 12:42 pm

Observer1 - "Oh no, the AI units have spotted one of the major glitches in the program"

Observer2 - "Oh well, shut it down then and boot the next universe simulation, what are we up to now, 43?"
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Re: Event Horizon Telescope ready to image black hole

#10  Postby felltoearth » Feb 04, 2019 11:51 pm

:lol:
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Re: Event Horizon Telescope ready to image black hole

#11  Postby newolder » Apr 04, 2019 10:11 am

ESO Media advisory about the EHT analysis: https://www.eso.org/public/announcements/ann19018/ - not an April Fool's prank, btw.
Press Conference on First Result from the Event Horizon Telescope
1 April 2019

The European Commission, European Research Council, and the Event Horizon Telescope (EHT) project will hold a press conference to present a groundbreaking result from the EHT.

When: On 10 April 2019 at 15:00 CEST

Where: The press conference will be held at the Berlaymont Building, Rue de la Loi (Wetstraat) 200, B-1049 Brussels, Belgium. The event will be introduced by European Commissioner for Research, Science and Innovation, Carlos Moedas, and will feature presentations by the researchers behind this result.

What: A press conference to present a groundbreaking result from the EHT.

...

and via https://twitter.com/hfalcke/status/1112565894411112449
Black hole shadow sizes were predicted to be about 50 microarseconds for #SgrA, 20-40 #M87 depending on mass, and smaller for other black holes. The resolution of the #EHT is at best 20 microarseconds with incomplete coverage. So, don’t expect anything like @Interstellar #Movie.

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Re: Event Horizon Telescope ready to image black hole

#12  Postby newolder » Apr 09, 2019 7:42 am

NSF press conference on first result from Event Horizon Telescope project

A global network of telescopes has been working to capture the first ever image of a black hole. On April 10 at 9 a.m. EDT, the National Science Foundation will hold a press conference to announce a groundbreaking result.

Video coverage expected here.
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Re: Event Horizon Telescope ready to image black hole

#13  Postby The_Piper » Apr 09, 2019 1:25 pm

:eager:
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Re: Event Horizon Telescope ready to image black hole

#14  Postby I'm With Stupid » Apr 09, 2019 4:38 pm

Veritasium's take on it.

Image
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Re: Event Horizon Telescope ready to image black hole

#15  Postby newolder » Apr 09, 2019 5:45 pm

That's a good take on the expected picture from General Relativity theory alone but the EHT analysis could also be used in the study of a Sgr. A* jet (if any)...
The Search for a Jet from Sgr A*

...
What are the implications of our finding? Plenty, and here I offer one that is far-reaching. The orientation of G359.944-0.052 now clearly tells us about the orientation of the jet axis, which, interestingly, coincides with the rotation axis of the Galactic disk. As the jet axis most likely follows the SMBH's spin axis, we may infer that the angular momentum of the SMBH has been coupled to that of the entire Galaxy, perhaps over a long time comparable to the age of the Universe. It would be very interesting to figure out the exact means of this coupling. But above all we are eager to see whether future observations, such as those afforded by the Event Horizon Telescope, may verify (or disprove) our jet proposal.

Zhiyuan Li

Chandra X-Ray Observatory blog source

ETA - The EHT has two supermassive black holes in its sights - the one in M87 is a thousand times further away than Sgr A* but is about 1000 larger. It may be M87 that grabs the headlines, who knows?
Last edited by newolder on Apr 09, 2019 7:18 pm, edited 1 time in total.
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Re: Event Horizon Telescope ready to image black hole

#16  Postby aufbahrung » Apr 09, 2019 5:54 pm

It'll be Cthulhu or nothing. :think:
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Re: Event Horizon Telescope ready to image black hole

#17  Postby Mike_L » Apr 10, 2019 12:58 pm

aufbahrung wrote:It'll be Cthulhu or nothing. :think:


Horrifying image leaked just ahead of the official cover-up announcement...

black_hole.jpg
black_hole.jpg (2.97 KiB) Viewed 117 times


:ahrr:





:grin:
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Re: Event Horizon Telescope ready to image black hole

#18  Postby newolder » Apr 10, 2019 1:02 pm

Live stream of these unearthly goings on...
https://www.youtube.com/user/VideosatNSF/live

M87 described by GR theory and observed by the EHT:
Image
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Re: Event Horizon Telescope ready to image black hole

#19  Postby Rumraket » Apr 10, 2019 1:17 pm

A
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Re: Event Horizon Telescope ready to image black hole

#20  Postby felltoearth » Apr 10, 2019 1:21 pm

“Fringe fitting”

OMG THEY’RE MESSING WITH THE DATA!! FAKE NEWS!!!
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