A Black Hole is imaged for first time ever by Event Horizon Telescope team

by | Apr 11, 2019 | Seradata News

Einstein predicted them in his Theory of Relativity (although doubting that they actually existed) and astronomers later proved their existence via the rotational movements of orbiting stars and the detection of gravitational waves – but a Black Hole had never been imaged. Until now. In a history-making achievement that combined eight radio-telescopes from around the world, a team of astronomers, astrophysicists, nuclear clock timing technicians and imaging specialists has managed to image a Black Hole – or rather the accretion disc of dust and gas that provides the “event horizon” border of the extreme gravitational “singularity” from where not even light can escape.

The Black Hole was of the super-massive (rather than the stellar) variety thought to be at the centre of all galaxies. In this case, it was at the centre of the M87 galaxy some 55 light years away from Earth.

The eight radio telescopes, in locations ranging from Antarctica to Chile and Hawaii to Spain, formed a “super radiotelescope”. Called the Event Horizon telescope (EHT), it provided a much higher resolution than from the separate telescopes.

Each of their observations of the radiation from the Black Hole had to be precisely timed using nuclear clock technology so that they could be combined via an interferometry technique. The massive amounts of data on hard discs were later combined at the MIT Haystack laboratory to create a single observation, which was later converted using imaging techniques to produce a single high-resolution image. The image was very close to that predicted, with a brighter crescent visible on one side of a black void because its particles are moving towards earth (appearing to have a higher brightness) rather than away.

The achievement is expected to lead to several more Black Hole observations – and perhaps a whole new form of science. The current EHT team is also attempting to image the Black Hole at the centre of our galaxy.

Seradata gives its hearty congratulations to the astrophysicists, technicians and imaging specialists in the 200-strong team that made this fantastic achievement possible. Particular  credit goes to Prof Heino Falcke, of Radboud University in the Netherlands, who originally proposed the experiment, and to Katie Bouman of MIT, whose computer algorithm collated the pixels and cleaned up the image. Bouman was reportedly embarrassed that the image processing role in the project had been artificially boosted by certain media outlets, which were a little too keen to put a human – especially a female – face on the achievement of the entire EHT team.

First ever image of Black Hole. Courtesy: EHT Collaboration

 

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