Monday, April 23, 2012

Aging HOLES: by leaps and bounds





The very first supermassive black holes the universe grew especially rapidly.













Supermassive black holes - objects of immense weight and power - form the core of the active centers of some of today's galaxies, including our own Milky Way. There are several such objects weighing tens of billions of suns.






It is believed that they appeared as a result of successive mergers of black holes smaller. However, the process is long, whereas the first of these supermassive holes existed even then, when the first stars and galaxies, about 700 million years after the Big Bang. Known age of supermassive black holes at least 1 billion years, comparable in size to the modern. What ...






U.S. scientists led by Tiziana DiMatteo (Tiziana Di Matteo) have examined the question using computer simulations - and with the support of computing power Supercomputer. They concluded that the appearance of supermassive black holes at the dawn of the universe was stimulated by powerful streams of cold gas, black holes rapidly saturates less substance. ...






A complex and very large-scale simulations, embracing the period of the first billion years after the Big Bang, showed that the cold gas flows do not behave as familiar to us today. Usually they are moving to a black hole, collide with other gas particles present in the galaxy. As a result, they are heated and begin to radiate, causing supermassive black hole ( more precisely - from the neighborhood ) are the most powerful sources in outer space. This process is also significantly slows down the fall of matter into the interior of a black hole and its growth.






Problems such supermassive black holes of antiquity did not know. Gas flows, everything accelerated, falling into them freely, huge elongated jets. Black holes are quickly saturated and grow - faster than anything else in the young universe.


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