Robert Lea is a science journalist in the U.K. whose articles have been published in Physics World, New Scientist, Astronomy Magazine, All About Space, Newsweek and ZME Science. He also writes about science communication for Elsevier and the European Journal of Physics. Rob holds a bachelor of science degree in physics and astronomy from the U.K.’s Open University. Follow him on Twitter @sciencef1rst.
However, SPT2215 seems to buck this trend, representing a galactic cluster that appears to have gotten a head start on its formation when compared to similar clusters of the same size that existed in the universe at the at the same time. With a mass around 700 trillion times that of the sun, SPT2215 is estimated to have been"relaxing" for around a billion years at the time astronomers are viewing it.
SPT2215 was spotted with NASA's Chandra X-ray Observatory, the space agency's now-retired Spitzer Space Telescope, the National Science Foundation/Department of Energy's South Pole Telescope, and the Dark Energy Survey project in Chile. When supermassive black holes are active, and feed on material that surrounds them in a thin, circular structure called an accretion disk. This whole region emits a huge amount of energy, and that energy heats galactic gas and dust, thus preventing the materials from clumping. On the flip side, when black holes are inactive, gas and dust can cool and come together, forming large"clumps" that can collapse and birth stars.
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Massive galaxy with no dark matter is a cosmic puzzleRobert Lea is a science journalist in the U.K. whose articles have been published in Physics World, New Scientist, Astronomy Magazine, All About Space, Newsweek and ZME Science. He also writes about science communication for Elsevier and the European Journal of Physics. Rob holds a bachelor of science degree in physics and astronomy from the U.K.’s Open University. Follow him on Twitter sciencef1rst.
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