Astronomers have discovered the most distant quasar in the universe


01/07/2011

The team of European astronomers using the Very Large Telescope (VLT) of the European Southern Observatory and other telescopes discovered and explored the most distant quasar found out today. This bright star beacon, a source of energy for which is the black hole mass of two billion Suns, is, by far, the brightest object found in the young universe. The results will be published in the journal Nature on June 30. "This quasar - a bright representative of the early universe. This is a very rare object that will help us to understand how supermassive black holes were formed within a few million years after the Big Bang," - said Stephen Warren, head of the komandy.Kvazary - it’s very bright distant galaxies, the source of energy which are supermassive black holes at their center. This incredibly bright light makes them space beacons that can open a lot about the history of the formation of the first stars and galaxies. Open quasar, called ULAS J1120 +0641, appeared before us as he was just 770 million years after the Big Bang (redshift 7.1). Among the objects bright enough for detailed study, it is the most remote. Next on the remoteness of the quasar appears to us as he has been through 870 million years after the Big Bang (redshift 6.4). More distant objects can not be detected in the visible spectrum as their radiation stretched expanding universe becomes infrared at time falling to the earth. For the collection and analysis of information on space objects in the infrared study was conducted UKIRT Infrared Deep Sky Survey (UKIDSS). A team of astronomers has tested millions of objects in the UKIDSS database to find those that may be distant quasars and their efforts were crowned with success.

"It took us five years to find this object," - said Bram Venemans, one of the study’s authors. "We were looking for a quasar with the displacement of more than 6.5. Detection of even more distant object with a redshift greater than seven, it was an unexpected surprise." "We think that the whole sky just typed more than a hundred quasars with redshifts greater than 7", - concluded Daniel Mortlock, the leading author of the study. "For the detection of the object required to expend considerable effort, but they were worth it, because this discovery will reveal the secrets of the early universe." Original: Physorg


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