June 29, 2022

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

Scientists have found evidence of rare and huge star explosions, the history of which can be traced back to the early days of the universe, which is less than 1 billion years after the Big Bang.
This ancient explosion, known as a “magnetic rotating supernova”, is about 10 times brighter and more powerful than the violent death of a typical supernova (waiting for most stars in the universe, including the Earth’s sun), leaving behind a strange stew meat. Elements that help fuel the next generation of stars. According to a study published in the journal Nature on July 7, 4,444 stars exploding like this must be huge (tens of times the size of the sun), spin fast, and contain powerful magnetic fields. David Yong, the lead author of the study, said that when a star like this dies, it will explode very powerfully, collapsing into a dense, vibrant shell, fusing the simple elements of the parent star into heavier and heavier ones. soup”. Astronomers at the Australian National University in Canberra said in a statement.
“This is an explosive death for stars, [and] no one has encountered this phenomenon before,” Yong said.
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Now, Yong and his colleagues have discovered a distant star at the edge of the Milky Way galaxy. It contains a strange chemical mixture that can only pass through this elusive type of explosion explained, the study author wrote. This star called 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 from the sun and formed about 13,000 million years ago, that is, less than 800 million years ago. years. From the earth. 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 Chile’s Atacama desert to carefully analyze the star’s chemical composition based on the wavelength of the light it emits. They found that, unlike most other known stars dating back to this early era, J2 has extremely low iron content and unusually high levels of heavy elements like 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.
This group of authors says that the only explanation for all superheavy elements is a super-big bang, a supernova that is amplified by rapid rotation and a strong magnetic field.
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– 9 ideas about black holes that surprise you Chiaki Kobayashi, co-author of the research from the University of Teford, said in a statement that a 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 a fast spin and strong magnetization collapses and explodes. This is the only thing that can explain the results. Chapter
such an incredible explosion must have occurred in the early stages of galaxy formation, leading to the birth of J2. The author of the study concluded that this fact suggests that supernovae may be an important method of star formation in the early universe. It is necessary to detect similar ancient stars with strange composition to further enrich these results.


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