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Astronomers measure dark matter ‘haloes’ around hundreds of ancient black holes for 1st time


A team of astronomers has, for the first time, “weighed” dark matter haloes surrounding actively feeding supermassive black holes in the bright hearts of ancient galaxies.

These black hole-powered hearts, or quasars, are often brighter than the combined light of every star in the galaxies around them. These super luminous central regions are “fired up” when supermassive black holes, which can have masses billions of times that of the sun, start greedily feeding on surrounding matter. 

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