Research results that there may be 'antimatter stars' made of antimatter in the universe



Antimatter 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 . Research results have been announced that there may be multiple 'Antistars' made of such antimatter in the galaxy.

Phys. Rev. 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
https://journals.aps.org/prd/abstract/10.1103/PhysRevD.103.083016

Stars made of antimatter could lurk in the Milky Way | Science News
https://www.sciencenews.org/article/antimatter-stars-antistars-milky-way-galaxy-space-astronomy

Stars made of antimatter could exist in the Milky Way | Live Science
https://www.livescience.com/potential-antistars-in-milky-way.html

According 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. 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.



A 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. Pay attention to the observation of a certain 'anti-helium' -like object. 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'.

As 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.


by SIMON DU POUR QUÉ (IRAP)

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. I'm guessing that it's being released. '

Regarding the results of this research, Mr. 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. It is much more likely that it is an unknown gamma-ray source, such as the nucleus of a distant galaxy. Nevertheless, if it proves to be an antimatter star, the theory of the beginning of the universe will be greatly rewritten. Will be done. '

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