Found a large cluster of galaxies

Scientists at the Harvard-Smithsonian Center for Astrophysics (CfA) found one of the largest objects in the universe — a galaxy cluster, which established several new space records, according to a press report center.

Discovery was made using NASA's space X-ray observatory, "Chandra" and nine ground-based observatories, including a 10-meter-long south polar telescope. The cluster of galaxies SPT-CLJ2344-4243 was named "Phoenix" and is located about 5.7 billion light-years from Earth. Name is due not only to the constellation in which it is located, but also some important properties of this unusual object.

"Galaxies in the center of most of the famous science clusters are inactive for billions of years, and at the center of the cluster galaxy woke characterized intensive star — said Michael McDonald of the Massachusetts Institute of Technology, the lead author of the study, which will be published in the journal Nature. — So mythology Phoenix bird reborn from its ashes, a good description of the property of this object revived. "

Unrestrained growth

Like other galaxy clusters, the Phoenix has a vast reservoir of hot gas, which itself holds more substance (other than a dark matter) than all the galaxies in the cluster together. Such an accumulation of matter can be detected only by means of X-ray telescope, which is the orbital observatory "Chandra."

Scientists believe that in the center of the cluster is a supermassive black hole, which is gaining a lot of record pace. This happens because of the cooling gas and the high rate of formation of new stars in Phoenix. "The galaxy and its black hole is going through a phase of unfettered growth, — the author of the study from the University of Bradford Benson Chicago. — The rapid growth can not last longer than a hundred million years. Otherwise, the black hole will be much more than any similar objects in vicinity of the cluster. " This situation is unusual, as was previously believed that black holes prevent the cooling of the gas to the point where star formation can begin. Intense star formation in the central galaxy Phoenix force us to reconsider this hypothesis.

Source: www.rg.ru

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