VIDEO | Cea mai clară imagine cu gaura neagră. Este pentru prima dată când astronomii au reușit să o pozeze atât de aproape

The Event Horizon Telescope (EHT) — a planet-scale array of eight ground-based radio telescopes forged through international collaboration — was designed to capture images of a black hole. In coordinated press conferences across the globe, EHT researchers revealed that they succeeded, unveiling the first direct visual evidence of the supermassive black hole in the centre of Messier 87 and its shadow. The shadow of a black hole seen here is the closest we can come to an image of the black hole itself, a completely dark object from which light cannot escape. The black hole’s boundary — the event horizon from which the EHT takes its name — is around 2.5 times smaller than the shadow it casts and measures just under 40 billion km across. While this may sound large, this ring is only about 40 microarcseconds across — equivalent to measuring the length of a credit card on the surface of the Moon. Although the telescopes making up the EHT are not physically connected, they are able to synchronize their recorded data with atomic clocks — hydrogen masers — which precisely time their observations. These observations were collected at a wavelength of 1.3 mm during a 2017 global campaign. Each telescope of the EHT produced enormous amounts of data – roughly 350 terabytes per day – which was stored on high-performance helium-filled hard drives. These data were flown to highly specialised supercomputers — known as correlators — at the Max Planck Institute for Radio Astronomy and MIT Haystack Observatory to be combined. They were then painstakingly converted into an image using novel computational tools developed by the collaboration.
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Echipa proiectului „Event Horizon Telescope” a făcut cea mai clară poză a găurii negre din galaxia Messier48. După prima ședință foto de acum 2 ani,

avem imagini și mai clare despre ce se întamplă acolo.

Este pentru prima dată când astronomii au reușit să măsoare polarizarea atât de aproape de marginea găurii negre.

Măsura polarizării este o semnătură a câmpului magnetic pe care acum îl putem observa.

Gaura neagră din galaxia Messier87 este la o distanță de 55 de milioane de ani lumină de Pământ. Realizarea imaginii a fost o muncă de echipă globală.

Colaborarea „Event Horizon Telescop” este realizată cu ajutorul a 8 radio telescoape terestre amplasate în Chile, Mexic, Spania, Hawaii, Arizona și Antarctica.

This image shows the jet in the M87 galaxy in polarized light. It is 6,000 light-years long. Image courtesy of ALMA (ESO/NAOJ/NRAO), Goddi et al.

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