The Technique for Detecting Meteors Could be Used to Find Dark Matter Particles Entering the Atmosphere - by uastronomer
A diagram of different radar systems that can be used to detect ion trails, such as those produced by meteors. SIMO, , MISO and MIMO . Image source:
Theoretical physicists have calculated the physical characteristics that dark matter particles could possibly have. Unfortunately, since most of what we know about these particles is that they interact weakly with normal matter , this leaves a wide range of possibilities. Dr Beacom points out that if dark matter particles fall within the larger, heavier end of the range of possibilities, then they would interact with “normal” matter more easily, although these interactions would still be rare.
If these particles are large, then traditional detectors on the ground might never see them, because the particles are being absorbed by Earth’s atmosphere. But if this happens, then they should have enough energy to produce an ionization trail, similar to what we see with meteors. Meteor-detecting radar installations could therefore be adapted to also search for dark matter particles — essentially turning the entire Earth’s atmosphere into one giant particle detector.
Hubble Space Telescope offers a cosmic cobweb of galaxies and invisible dark matter in the cluster Abell 611. Credit: ESA/Hubble, NASA, P. Kelly, M. Postman, J. Richard, S. Allen
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