4 p.m. Here is a comparison of two black holes, M87 * and Sagittarius A *! ” We have two completely different types of galaxies and two different masses of black holes, but near the edge of these black holes they are surprisingly identical. “It simply came to our notice then Co-Chair and Professor of the Scientific Council of CNRS, EHT Theory at the University of Amsterdam, Netherlands. ” It tells us Manages these objects closely, and any difference we see in the distance must be due to differences in matter surrounding the black holes. ⁇
3:45 p.m. Many animations and information are included. In particular, there are many images that illustrate how important the work of researchers is: they contained a large number of images on average. Now they want to compare two images obtained, which are very similar to very different black holes: one represents 4 million solar masses – Sagittarius A *, and the other 6.5 billion solar masses, M87 *! “We have images for two black holes – one large node and one small node.And researcher at the Institute of Astronomy and Astronomy in Taipei.– So, we can go even further in testing behavior In these extreme circumstances than ever before. Keichi Asada, co-author of one of the six studies published in the journal, said.
UArizona astronomers have helped capture the first image of a giant black hole in the center of our Milky Way galaxy as part of an international mission. @ehtelescope. Called Sagittarius A *, this black hole is 4 million times larger than the Sun. https://t.co/pAd8WNfo6Qpic.twitter.com/t8gw7SgXTX
– University of Arizona (uarizona) May 12, 2022
3:35 p.m. We suspected it, but researchers confirm it: Sagittarius A * proof is actually a! “We were amazed at how well the size of the ring matched the predictions of the general theory of relativity. ⁇Jeffrey Bower, EHT Project Scientist, Institute of Astronomy and Astronomy, Academy Sineca, Taipei. The Sagittarius orbits A * in a matter of minutes, compared to several days or weeks for M87 *, scientists explain. This means The Changed quickly during the observations made, and then complicates the calculations to obtain an image.
3:07 pm: This is the world’s first EHT researcher (Event Horizon Telescope) And this ESO President Xavier Barcons. Located in our center The At 27,000 From us, this astronomical monster with a mass of 4 million solar masses can reach the diameter of its horizon 6 million kilometers or 15 times the distance of the Earth-Moon.(European Observatory) Sagittarius A * has now released the first image of the black hole! “We have been close many times before.” Said in
Synchronized telescopes around the world and 5 year calculations!
Getting this picture is not easy! It all started in April 2017 with a surveillance campaign In order to create the equivalent of a giant interferometer in the world, the size of the earth. In doing so, the Angular size, which defines the smallest angle that researchers can observe in detail, is so small that many objects that are generally invisible are visible. This is M87 * and , The two black holes will be identical in their apparent diameter and will require the resolution that VLBI can achieve. Effect, At 6.5 billion solar masses and 50 million light-years, Sgr A * is much larger and farther away, so its diameter from Earth is equal to Sgr A *.Very long foundation, also called . This tracking technique involves the simultaneous use of several people
EHT cooperation, thanks to this method, makes it possible to achieve the world’s largest angular resolution force. Eight were inside during the 2017 surveillance Released, but not the Sagittarius A * that the scientific community expected.Located around the world: Mexico, Chile, , USA, Spain. In each case, the antenna It is located at a high altitude, in order to remove air pollution as much as possible. This process requires a lot of preparation because the synchronization must be perfect. Therefore, the only surveillance campaign by this method took place in 2017, more precisely from April 4 to 14, 2017. Then comes data analysis! This phase is just as difficult and super demanding as the first phase , Are called communicators. In total, more than 350 people participated in this technological achievement. Therefore, in 2019, the
Finally, researchers want to test general relativity
But what does this film bring scientifically? Many things. First, getting the actual appearance of the black hole allows it to be sampled and compared Existing, in order to fix them. So lets learn more about this . In fact, gaining the dimension of the horizon, also known as the shadow of the black hole, and the luminosity surrounding it give many clues to its properties: of course its size, its mass, but above all the dynamics of its disk. Multiplication. It is made up of matter that attracts towards the black hole itself, heats up to very high temperatures and rotates at relative speeds. In fact, it only takes 4 minutes and 30 seconds for the disk dust to form. Around the black hole, let’s remember that it has a diameter of 6 million kilometers!
This also allowsTo test general relativity established by Einstein in 1916, under strong domain rule: When particles change relatively. They see the curve of light caused by the effects of gravity, ” ”: The black hole is so large that it does not follow the linear path of light as it approaches. This capability opens up a new way to test general relativity in strong-field regulation and to study and study the accumulation and flow processes at the edge of the black hole. Basis and existence of black holes .
You have to remember
- In 2017, a major surveillance campaign was launched around the world to monitor two black holes, M87 * and Sgr A *, located 50 million light-years and 27,000 light-years apart, respectively.
- Then, on April 10, 2019, the first photo of the M87 * was released, but not the photo of the SgrA *, which required many more calculations.
- After three years of extra work, this first film finally came out on May 12, 2022! The reason for this “delay”: Sagittarius A *, the object in the concentric disk around the central black hole, rotates so fast that it completes its orbit in a few minutes. This makes the obtained images unstable and requires more computational time.
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