2019 is here. With him we promised a great moment in astronomy. For many years, the Event Horizon telescope is working to bring us the first telescopic photograph of the black hole events horizon.
Indeed, for all its popularity in the public imagination, we never saw a black hole . The reason for this is ridiculously simple.
Black holes, as you can see, are literally invisible. The attraction of their attraction is so huge that, after a certain point, nothing escapes. This includes electromagnetic radiation, such as X-rays, infrared, light and radio waves, which will allow us to directly identify the object
. you never want to find yourself, this is also our key to actually rendering a black hole.
Although we may not see the black hole itself, there is a chance that its horizons of events can be photographed; and we are remarkably close to seeing the results of the Event Horizon (EHT) telescope, which should be a public announcement every day.
Update (April 5, 201
But long before the EHT was an astrophysicist Jean-P'Lourmen. Back in 1978, he already gave us what can be considered the first image of the horizon of the black hole events
This, of course, is not an actual photo. Luminet, whose background was in mathematics, used his set of skills to perform the first computer simulation of how a black hole might look like an observer using the 1960s IBM 7040 computer hammer.
"In at that time it was very exotic Substance and most astronomers did not believe in their existence, – said Lumenet ScienceAlert.
"I wanted to study the awesome physics of black holes and suggest specific mechanisms that could help get their indirect signatures existence. pursue a pun, with my "Luminet" & # 39; I liked the idea of how perfectly ill star could generate observed phenomena.
What data the computer returned, Luminet then carefully constructed by hand with pen and India ink on a negative paper, as if he were a human printer.
This fuzzy image, as seen above, shows as the flat disk of a black hole might look like if we were close enough to see it. It does not look flat, because the intense gravitational pull of a black hole bends the light around it, "explained Luminet in an article published on arXiv. last year.
"The bend of the light rays also generates a secondary image that allows us to see the other side of the accretion disk on the opposite side of the black hole with the Observer."
Lumen was the first, but he was not the only enthused mystery of how black might look The others have been trying to visualize these objects ever since, and have even made efforts on a silver screen.
2014 movie by Christopher Nolan Interstellar half Aliyev for the fact that he is "scientifically accurate" depicting a black hole, which is based mainly on works performed by Luminet decades earlier and created in consultation with the theoretical physicist Kip Thorne of Caltech.
Ultimately, the film was chosen A simplified version to be less confusing and to look pretty on the screen.
This is definitely impressive, but, as Lumen and Thorne point out, this is not exactly what the black hole looks like
Primary and Secondary images created by the gravitational field are present and correct. But, unlike the Lumen image, the brightness of the disc is homogeneous.
"It is this strong asymmetry of explicit luminosity," wrote Lumen, "is the main sign of a black hole, a single heavenly object. areas of the accretion disk, the speed of rotation, close to the speed of light, and cause a very strong Doppler effect.
He wrote a 15-page paper on the science of the film, and himself Thorn wrote
You may notice that all these versions of the black hole are very different from other types of black holes that you have seen, best known for opening I am LIGO in 2016.
They are based on the work of astrophysics by Alain Riazuelo of the French National Center for Scientific Research and the International Astronomical Union, which first modeled such a black hole in 2016. because the illustration shows a calm black hole – one without an accretion disk.
Burned from this font of dust and gas, gravitation of a black hole distorts space behind it; if we were close enough to see a black hole similar to this, then we would be in motion, captured by its gravity in orbit. That's why it seems to be moving around the stars field
In the case of two black holes together, as seen in the LIGO video, each black hole has a small banano-like secondary image of another hole that is behind it. (Gravity precision .)
The EHT focused on Sagittarius A *, a supermassive black hole in the center of our own galaxy, the Milky Way.
We do not know what we will see; it is possible that the data will return only a few blurred pixels. (If so, more telescopes will join the co-operation, and scientists will try again.)
Given that the black hole has an accretion disk during observations, we expect it to resemble the work of Lumen. In addition, the collaboration, hopefully, will help us understand more about the polarization of radiation, the structure of the magnetic field, and the relativistic black hole jets. This has already given some hint about the structure of the space around the black hole
But what is the fascination about the work of EHT? We are totally with Luminet on this.
"Accretion Disc Photo!" he said. And we look forward to.
The version of this article was first published in January 2019.