Published in Horizon, 4 Dec 2015
Galaxies aren’t as massive as computer simulations suggested they should be – and now scientists have one explanation for this.
Past computer simulations have given broad predictions for galactic masses, but these have been much bigger than the actual masses deduced from telescope observations. This discrepancy has long been investigated by astrophysicists.
About a decade ago, theorists came upon the idea that the black holes might have a role to play. The jets they emit were introduced as a means to expel gas out of galaxies, or to prevent gas from clumping together: jets can be 10 billion times more powerful than the radiation emitted by our sun. […]
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