Astronomers don't know what dark matter is, only that it's most of the mass of the Universe and doesn't interact with regular matter and energy, or itself.
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Astronomers don't know what dark matter is, only that it's most of the mass of the Universe and doesn't interact with regular matter and energy, or itself. Unlike neutrinos, it's probably heavy, slow-moving, and cold. And according to new research, it doesn't decay quickly, if ever. Astronomers looked at the light from galaxies and didn't see any additional infrared radiation coming from decaying dark matter, meaning it lasts at least ten octillion seconds.
New limits found for dark matter properties from latest search
Tokyo, Japan – A team led by a member of Tokyo Metropolitan University have made advances in the search for dark matter, observing galaxies using new spectrographic technology and the Magellan Clay Telescope. With a mere 4 hours of observations, precise measurements in the infrared range have set new limits on the lifetime of dark matter. Their findings highlight the crucial utility of their technology and extend the search to less explored parts of the spectrum.
EurekAlert! (www.eurekalert.org)
