Evidence is growing for an ultralight dark matter particle called the axion
We know that there are anomalies between the patterns we have seen in gravitational lensing and WIMP models, but the researchers found that when the WIMP models were switched out for axion ones, those anomalies went away. They also tested the models on a real lensing system and found that the axion model fit much better.Voyage across the galaxy and beyond with our space newsletter every month.
“I don’t think this counts as proof that ultralight axions exist, but it’s a compelling result,” says at the University of New Hampshire, who wasn’t involved in the work. “It provides further evidence that axions as a class of dark matter candidates are compelling.”with no luck, so this work is part of a renaissance for axions and other dark matter candidates that haven’t been as thoroughly explored.
also at the Harvard-Smithsonian Center for Astrophysics and not involved in the work. “In other words, there are low-hanging fruits waiting to be picked, relative to what’s been done for other candidates like WIMPs.”
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