So ordinary matter floating through the cosmos in the form of gas and dust would hit these antistars, generating excess gamma radiation, Dupourqué said.īy combing through data from NASA's Fermi gamma-ray telescope, he and his co-authors uncovered 14 examples of small compact objects shining brightly in gamma rays that didn't show up in other star catalogs, meaning scientists don’t know what they are. "If these objects existed, we could not distinguish them from a regular star," Dupourqué said.īut when antimatter and regular matter meet, they violently annihilate each other, leaving behind nothing but gamma rays. That got him and his colleagues wondering: Where exactly could this antihelium have come from? While physicists are reasonably certain that no large pockets of antimatter exist in the universe, some theorists have suggested that bits of the charge-reversed material could have collected into star-like objects, essentially forming antistars.Īntistars would fuse antihydrogen into antihelium to produce light, but they would otherwise look fairly ordinary. But no known process can create something complex like antihelium, Simon Dupourqué, a doctoral candidate in astrophysics at the University of Toulouse in France, told Live Science. Will be done.Cosmic rays can sometimes hit ordinary matter and produce simple antimatter particles, like antiprotons and positrons - the charge-reversed version of an electron. Nevertheless, if it proves to be an antimatter star, the theory of the beginning of the universe will be greatly rewritten. It is much more likely that it is an unknown gamma-ray source, such as the nucleus of a distant galaxy. Dupurque said, 'It is difficult to confirm that the antimatter star candidate found this time is actually an antimatter star, and it is not likely that it is a pulsar that is stronger than a normal pulsar or very much. Regarding the results of this research, Mr. Since these gamma ray sources are clearly different from known gamma ray sources such as pulsars and black holes, the research team said, 'The gamma ray source identified this time is an antimatter star, and gamma rays are emitted by collision with interstellar gas and dust. We analyzed the observation data collected by the Fermi Gamma-Ray Space Telescope over a 10-year period, based on the fact that 'a kind of gamma ray is emitted when anti-helium comes into contact with ordinary substances'.Īs a result, it was found that 14 of the approximately 5,800 gamma-ray sources that were observed emit gamma rays of the type that is thought to be generated when matter and antimatter undergo annihilation. Pay attention to the observation of a certain 'anti-helium' -like object. The European Organization for Nuclear Research (CERN) explains, 'When matter and antimatter annihilate, there is a one-billionth chance that ordinary matter survives, which shaped the present universe,' but why matter? It is unclear if more was left than antimatter.Ī research team led by Simon Dupurque of the French Institute for Astrophysics and Planetary Sciences (IRAP), who was working on this problem, said that the observation instrument called the alpha magnetic spectroscope installed at the International Space Station was made of antimatter helium. Stars made of antimatter could exist in the Milky Way | Live ScienceĪccording to the current cosmology, 'matter and antimatter were generated in the same amount at the same time as the birth of the universe', but if so, all celestial bodies should have disappeared without a trace due to annihilation. Stars made of antimatter could lurk in the Milky Way | Science News D 103, 083016 (2021) -Constraints on the antistar fraction in the Solar System neighborhood from the 10-year Fermi Large Area Telescope gamma-ray source catalog Research results have been announced that there may be multiple 'Antistars' made of such antimatter in the galaxy. 20:00:00 Research results that there may be 'antimatter stars' made of antimatter in the universeĪntimatter is a substance that has an electric charge opposite to that of a normal substance, and when it comes into contact with a substance, it releases a huge amount of energy and annihilates.
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