The international joint research team of EHT and Event Horizon Telescope, which consists of researchers from Korea, the U.S., Europe, Japan, South America and Africa, released an A video of the supermassive black hole Sagittarius located in the center of the Milky Way galaxy on the 12th EHT-provided black holes in the center of our galaxy for the first time in 2019, followed by black holes in the ring of light. Einstein’s general theory of relativity was more accurate, as it was confirmed that black holes were found to be similar in size and location
The international joint research team of EHT and Event Horizon Telescope, which consists of researchers from Korea, the U.S., Europe, Japan, South America and Africa, released an A video of the supermassive black hole Sagittarius located in the center of the Milky Way galaxy on the 12th Sagittarius A black hole is the second black hole taken by the EHT team after the supermassive black hole M87′ observed in 2019
In 2019, EHT observed the shadow of a supermassive black hole, 55 million light years away from Earth, revealing for the first time a black hole inside a ring of light was formed because the surrounding light could not escape from gravity
In announcing the M87 results, EHT said it was also observing Sagittarius A and that the analysis would take longer Sagittarius A is 27,000 light years away from Earth Reinhard Gentzel, head of the Max Planck Institute of Alien Physics in Germany, and Andrea Gez, a professor at the University of California in Los Angeles, won the 2020 Nobel Prize for Physics for predicting the mass of Sagittarius A based on the orbit of stars
Sagittarius A is one-thousandth of an M87 but its mass is only one-thousandth of an M87, making it more difficult to observe. The smaller the mass, the smaller the event horizon, the outer boundary of the black hole The mass of M87 is 6.5 billion times that of the Sun, and the size of the event horizon of Sagittarius A is only 25 million kilometers. It is even more difficult to observe because the stars in our galaxy cover Sagittarius A and are surrounded by scattered gas clouds
The fact that the two black holes are different from each other shows that the shape of the black hole that Einstein predicted in general relativity in 1915 appears everywhere “We can analyze the flow of matter around ultra-mass black holes to reveal the formation and evolution of galaxies,” the EHT research team said. “We expect new results such as precise verification of general relativity through further research.”
The scientific community expects this discovery to be the key to unraveling the secrets of our galaxy’s creation As it captures the rapidly changing shadows of black holes, it is expected that it will be possible to directly observe the process of substances being sucked into black holes Comparing the M87 with Sagittarius A black hole, some expect that it may understand the physical origin of phenomena such as ‘black hole jet’ in which substances are released from the black hole
More than 300 researchers from 80 institutions around the world, including Korean researchers such as the Korea Astronomical Research Institute, participated in this study EHT has implemented an earth-sized virtual telescope by connecting 11 radio telescopes around the world, including Spain, Antarctica, Chile and Greenland If radio telescopes observe celestial bodies at the same time, the resolution will increase as seen by one giant telescope, the research results were published in the International Journal of Astrophysics on the 12th
Reporter Cho Seung-han, email! #160protected
