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Connecting the Dots in the Sky Could Shed New Light on Dark Matter

22 Jan 2020, 22:26 UTC
Connecting the Dots in the Sky Could Shed New Light on Dark Matter
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Astrophysicists have come a step closer to understanding the origin of a faint glow of gamma rays covering the night sky. They found that this light is brighter in regions that contain a lot of matter and dimmer where matter is sparser - a correlation that could help them narrow down the properties of exotic astrophysical objects and invisible dark matter.The glow, known as unresolved gamma-ray background, stems from sources that are so faint and far away that researchers can't identify them individually. Yet, the fact that the locations where these gamma rays originate match up with where mass is found in the distant universe could be a key puzzle piece in identifying those sources."The background is the sum of a lot of things 'out there' that produce gamma rays. Having been able to measure for the first time its correlation with gravitational lensing - tiny distortions of images of far galaxies produced by the distribution of matter - helps us disentangle them," said Simone Ammazzalorso from the University of Turin and the National Institute for Nuclear Physics (INFN) in Italy, who co-led the analysis.The study used one year of data from the Dark Energy Survey (DES), which takes optical ...

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