Science, Space and Technology News 2024
Galaxy cluster, left, with ring of dark matter visible, right. Credit: NASA, ESA, M. J. Jee and H. Ford
In physics, however, the mathematical zero is always a strong statement. In the late 70s, particle physicists Roberto Peccei and Helen Quinn tried to These were dubbed “axions” after a detergent brand because they could “clear up” the neutron problem. And even more. If axions were created in the early universe, they have been hanging around since then. Most importantly, their properties check all the boxes expected for dark matter. For these reasons, axions have become one of the
At present, the most sensitive approach targets the halo of dark matter permeating the galaxy with a device called a haloscope. It is a conductive cavity immersed in a strong magnetic field; the former captures the dark matter surrounding us , while the latter induces the conversion into light. The result is an electromagnetic signal appearing inside the cavity, oscillating with a characteristic frequency depending on the axion mass.
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