RAS: Supermassive black holes: nature of dark matter hints

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RAS: Supermassive black holes: nature of dark matter hints

Post by bystander » Mon Mar 22, 2010 5:09 pm

Supermassive black holes: hinting at the nature of dark matter?
Royal Astronomical Society - 2010 March 22
About 23% of the Universe is made up of mysterious ‘dark matter’, invisible material only detected through its gravitational influence on its surroundings. Now two astronomers based at the National Autonomous University of Mexico (UNAM) have found a hint of the way it behaves near black holes. Their results appear in a letter in the journal Monthly Notices of the Royal Astronomical Society.
Image
Artist's impression of the distortion of spacetime by a supermassive
black hole at the centre of a galaxy. (Felipe Esquivel Reed)


An upper limit to the central density of dark matter haloes from
consistency with the presence of massive central black holes