Space and astronomy news
Image from a computer simulation of the distribution of matter in the universe. Orange regions host galaxies; blue structures are gas and dark matter. Credit: TNG Collaboration
Like DM, the existence of axions was postulated to address gaps in our understanding of the behavior of another elementary particle—the neutron. However, also like DM, these hypothetical particles have not yet been detected after decades of investigation. This is understandable since, if such particles exist, they would be extremely light, making them very hard to detect through experiments or astronomical observations.
This led Noordhuis and his team to consider neutron stars since they are the densest class of stars in the Universe and generate very powerful electromagnetic fields. In fact, neutron stars generate magnetic fields that are billions of times stronger than Earth’s magnetosphere. What’s more, astronomers have used supernovae and cooling neutron stars for some time to constrain the properties of axons, including their mass and interactions with other particles.
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