Computer simulations by astronomers support the idea that dark matter -- matter that no one has yet directly detected but which many physicists think must be there to explain several aspects of the observable universe -- exists, according to the researchers.
Computer simulations by astronomers support the idea that dark matter -- matter that no one has yet directly detected but which many physicists think must be there to explain several aspects of the observable universe -- exists, according to the researchers, who include those at the University of California, Irvine.
The test involved running computer simulations with both types of matter -- normal and dark -- to explain the presence of intriguing features measured in real galaxies. The team reported their results inThe features in galaxies the team found"are expected to appear in a universe with dark matter but would be difficult to explain in a universe without it," said Mercado."We show that such features appear in observations of many real galaxies.
The features also appear in observations made by proponents of a dark matter-free universe."The observations we examined -- the very observations where we found these features -- were conducted by adherents of dark matter-free theories," said co-author Jorge Moreno, associate professor of physics and astronomy at Pomona College."Despite their obvious presence, little-to-no analysis was performed on these features by that community.
"It would be interesting to see if we could use this same relationship to even distinguish between different dark matter models," said Mercado."Understanding how this relationship changes under distinct dark matter models could help us constrain the properties of dark matter itself."Francisco J Mercado, James S Bullock, Jorge Moreno, Michael Boylan-Kolchin, Philip F Hopkins, Andrew Wetzel, Claude-André Faucher-Giguère, Jenna Samuel.
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