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A recent study from the ARC Centre of Excellence for Dark Matter Particle Physics suggests that neutron stars could play a crucial role in understanding dark matter. The study found that dark matter particles, when colliding within neutron stars, can quickly heat these stars, potentially making them observable through future astronomical technologies.
It was previously thought that this energy transfer could take a very long time, in some cases, longer than the age of the universe itself, rendering this heating irrelevant. “It is one thing to theoretically predict dark matter, but it is another thing to experimentally observe it. Experiments on Earth are limited by the technical challenges of making sufficiently large detectors. However, neutron stars act as huge natural dark matter detectors, which have been collecting dark matter for astronomically long timescales, so they are a good place for us to concentrate our efforts,” Professor Bell said.
University of Melbourne PhD candidate Michael Virgato said this is expected to heat up old, cold, neutron stars to a level that may be in reach of future observations, or even trigger the collapse of the star to awould be heated up. For this to happen, the dark matter must undergo many collisions in the star, transferring more and more of the dark matter’s energy until, eventually, all the energy has been deposited in the star,” Mr. Virgato said.
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