Illustration of how light is transformed into ALP by the galaxy. Credit: Credits to Aurore Simonnet, Sonoma State University (for the active galaxy core) and to NASA/NOAA/GSFC/Suomi NPP/VIIRS/Norman Kuring (for image of earth).
Researchers at Stockholm University are getting closer to corner light dark-matter particle models. Observations can rule out some axion-like particles in the quest for the content of dark matter.
Physicists are still struggling with the conundrum of identifying more than 80% of the matter in the Universe. One possibility is that it is made up by extremely light particles which weigh less than a billionth of the mass of the electron. These particles are often called axion-like particles (ALPs)...
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