Astronomers have calculated the mass of a supermassive black hole at the frequency of the radiation residues absorbed her stars. The paper was published in the journal Science, a brief account of its contents writes ScienceNow.
The researchers analyzed the gamma radiation from the flash of Swift J1644+57, recorded in late March 2011. According to scientists, it was the most vivid and powerful flash ever recorded by astronomers. Initially, researchers believed the cause of the outbreak of a supernova explosion, but later it turned out to be not so - supernova explosions usually fade within a few days, while the emission of Swift J1644+57 lasted for months. The source of the outbreak was the radiation of the heated material of the star is absorbed by a black hole.
The researchers found that the radiation varies in intensity with a period of 200 seconds. According to astronomers, this is due to the rotation of the accretion disk around the black hole. Based on this frequency and other characteristics of the radiation, the authors were able to calculate the approximate mass of the object swallowed a star. It was equal to 0, 45 to 5 million Solar masses, which is typical for a class of supermassive black holes, which can be found in the center of most galaxies. The figure corresponds roughly to the earlier estimates, though the latter appeared to be slightly overrated.
Object data gathered by several telescopes. The first flash was fixed telescope SWIFT, and then to its emission poluchili telescopes Hubble and Chandra. Based on the analysis of the collected data were previously published two works, explaining the unusual brightness and duration of the outbreak. Its uniqueness was associated, first, with the fact that the jet from the black hole was directed towards the Earth, and secondly, to the fact that the absorption of stars took place gradually.
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According to the materials: lentago
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