Astronomers have recorded an amazing history of the dance of death between two massive stars 500 light-years from Earth, leading to a new process of supernova formation.
The new finding, published September 3 in the journal Science, was made by the National Radio Astronomy Observatory (NRAO) in New Mexico. Evidence from a recent study shows that a black hole or neutron star erupted into the core of its companion star, causing it to explode supernova.
Dillon Dong, an astronomer at the California Institute of Technology and author of the article Explaining the discovery, Jadid said, "Theories predicted that this would happen, but this is the first time we have actually observed it." The VLA, a radio observatory in Sokoro, New Mexico, has alerted scientists to the phenomenon. Under the multi-year project "VLASS Sky Mapping" (VLASS), which started in 2017. Dong and his colleagues were looking at the images when they noticed a glowing object in the radio waves. This crime did not appear in previous VLA data.
So the researchers focused on it. They used the VLA and the Keck Telescope in Hawaii to observe this new object, now known as the VT 1210 + 4956. They found that the brilliant radio emission of VT 1210 + 4956 comes from around a distant, star-forming galaxy 500 million light-years away.
The International Space Station has detected the X-ray eruption coming from VT 1210 + 4956.
Carl Gott ski's very large array
According to the US National Radio and Television Observatory (NRAO), various observational data allowed researchers to Fascinating parts of the history of the death dance between two giant stars over several centuries.
Like many stars much larger than our Sun, these two stars are formed in pairs and Their orbits are also close to each other. One of the two stars, which was larger than the other, evolved faster during normal life with nuclear fusion. The star first exploded as a supernova, leaving a very dense black hole or neutron star.
Following this cosmic event, the orbit of a black hole or neutron star steadily approached the companion star and about It entered the atmosphere of a companion star 300 years ago to begin the dance of death. The exhaust gas was directed outward in a spiral, forming a donut-shaped expanding ring called a "torus" around both stars.
The process of formation of the new supernova explosion VT 1210
1. A neutron star or black hole orbits a companion star and approaches it over thousands of years. 2. A neutron star or black hole enters the atmosphere of a companion star and ejects gas in an expanding spiral. 3. When a neutron star or black hole reaches the atmosphere of a companion star, it briefly forms a disk that ejects a super-fast jet. The fusion of the nucleus that holds the nucleus under its own gravity is disrupted, causing the supernova to collapse and eventually explode. 4. The supernova explosive material reaches the material from the previous explosion and produces the powerful shock observed by the VLA. Credit: Bill Saxton/NRAO/AUI/NSF
Astronomers say the black hole, or neutron star, has eventually moved toward the center of the second star. This process disrupted the fusion of the nucleus, which caused the companion star to glow, and prevented the nucleus from collapsing under its own gravity. Thus, without fusion, the nucleus of the second star collapsed and exploded like a supernova.
As Dong pointed out: It accelerated the explosion process. It dealt with those substances and caused powerful shocks. That's why VLA radio images show bright radio broadcasts.
According to Greg Hallininan, another researcher at the California Institute of Technology, To express. "The wreckage of a star that exploded a long time ago has collapsed in its companion, causing it to explode." Because massive stars typically explode as supernovae when they run out of fuel, researchers have always looked for other types of stellar explosions to help them better understand the universe.
Cover Photo: Supernova Explosion VT 1210 + 4956
Credit: Bill Saxton/NRAO/AUI/NSF
Sources: EarthSky, Axios