Physics - Counting All the Antistars in the Sky : vimarsana.

Physics - Counting All the Antistars in the Sky


Counting All the Antistars in the Sky
April 20, 2021•
Physics 14, s50
Analyzing gamma-ray sources leads to an upper limit on how many antimatter stars could exist in the Milky Way.
S. Dupourqué/IRAP
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Nowadays it is taken for granted that the Universe contains no substantial amounts of antimatter. Most cosmological models include hypothetical physical processes to explain why matter dominates although the Universe should have been created with equal amounts of both. But in 2018, the Alpha Magnetic Spectrometer 2 (AMS-02) experiment on the International Space Station possibly detected several antihelium nuclei, suggesting that some original antimatter survived to form antistars and even antigalaxies. Now, Simon Dupourqué and colleagues at the Institut de Recherche en Astrophysique et Planétologie (IRAP), France, identify possible antistars based on ten years of gamma-ray observations from the orbiting Fermi Gamma-ray Space Telescope and derive constraints on how many such objects might exist in our solar neighborhood [1].

Related Keywords

Canada , France , Vancouver , British Columbia , Rachel Berkowitz , Simon Dupourqu , , Alpha Magnetic Spectrometer , International Space Station , Institut De Recherche , Fermi Gamma Ray Space Telescope , Galactic Disk , Corresponding Editor , Solar System , Fermi Large Area Telescope , கனடா , பிரான்ஸ் , வான்கூவர் , பிரிட்டிஷ் கொலம்பியா , ரேச்சல் பெர்கோவிட்ஸ் , சர்வதேச இடம் நிலையம் , நிறுவனம் டி ரெக்ஃப்‌ச் , ஃபெர்மி காமா ராய் இடம் தொலைநோக்கி , விண்மீன் வட்டு , சூரிய அமைப்பு , ஃபெர்மி பெரியது பரப்பளவு தொலைநோக்கி ,

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