June 29, 2022

For the first time, a rare “supernova” explosion was detected at the edge of the Milky Way

Scientists have found evidence of rare and huge stellar explosions dating back to the early days of the universe, less than a billion years after the Big Bang.
is called a “magnetically rotating supernova”. This ancient explosion is about 10 times brighter than a typical supernova (expecting the violent death of most stars in the universe, including Earth’s sun), and has more energy, leaving a strange stew. Meat is an element. It helps feed the next generation of stars. According to a study published in the journal Nature on July 7, 4,444 stars that explode like this must be large (tens of times the size of the sun), fast rotating and contain powerful magnetic fields. When a Hong Jinxing star like this dies, it will make a very powerful explosion: it collapses into a dense, vibrant shell, fusing the simple elements of the original star into a “soup” of heavier matter, says the lead author of the research, David Yong. , an astronomer at the Australian National University in Canberra, said in a statement.
“This is an explosive death for the stars, [and] no one has discovered this phenomenon before,” Yong said.
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Now, Yong and his colleagues have discovered a distant star on the edge of the Milky Way galaxy. It contains a strange chemical mixture. Explained by the elusive explosion, it was written by the research author. This star named SMSS J200322.54114203.3 (but we call it J2 for short) is located in the halo of the Milky Way, about 7,500 light years away from the sun, and formed about 13 billion years ago, which is less than 800 million years later. According to the researchers, the universe was born. Stars like this are the oldest stars in existence.
In their new study, the researchers used special instruments on the giant Magellan telescope in the Atacama Desert in Chile to carefully analyze the chemical composition of the star based on the wavelength of the light it emits. They found that, unlike most other known stars dating to this early era, J2 has extremely low iron content and an unusually large amount of heavy elements such as zinc, uranium, and europium. The merger between
neutron stars (the collapsed crust of a huge star, packing the mass of the sun into an area the size of a city) could explain the presence of these heavier elements in similar stars in the early universe; However, let’s say researchers, J2 contains too many “extra” heavy elements that don’t even fit the neutron star fusion theory. The authors of
say that the only explanation for all superheavy elements is the super-big bang, a supernova that is amplified by rapid rotation and a strong magnetic field.
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“We have found for the first time now that directly indicates the existence of Hurt, United Kingdom Chiaki Kobayashi, a co-author of the Ford University research, said in a statement that a different type of supernova produces all the stable elements of the periodic table at the same time: the core of a massive star with fast and strong rotation. magnetization collapses and explodes, is the only thing that can explain the result. “Chapter
such an incredible explosion must have occurred at the earliest stage of galaxy formation, leading to the birth of J2. The study authors concluded that this fact suggests that supernovae may be an important method of star formation in the early universe. It is necessary to probe equally old and strangely composed stars to further develop these results.

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