Early supermassive black holes could grow it alone

Physicsworld.com

Astronomers know that supermassive black holes at the centres of galaxies existed in the early universe, but how these objects managed to accumulate such heft in a short cosmological timespan is a mystery... An alternative explanation is that a very large amount of gas - roughly 100,000 solar masses - may have collapsed directly into the black hole... 'It's a remarkable achievement to be able to simulate such a huge volume of space to the precision needed to say something about a single black hole,' says Daniel Mortlock [Physics] of Imperial College London.

http://physicsworld.com/cws/article/news/48364