Probablemente el objeto emisor de radio más débil jamás detectado europapress.es - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from europapress.es Daily Mail and Mail on Sunday newspapers.
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IMAGE: Composite image of galaxy cluster MACSJ0717.5+3745, with VLA radio image superimposed on visible-light image from Hubble Space Telescope. Pullout is detail of distant galaxy VLAHFF-J071736.66+374506.4 likely the faintest radio-emitting. view more
Credit: Heywood et al.; Sophia Dagnello, NRAO/AUI/NSF; STScI.
Radio telescopes are the world s most sensitive radio receivers, capable of finding extremely faint wisps of radio emission coming from objects at the farthest reaches of the universe. Recently, a team of astronomers used the National Science Foundation s Karl G. Jansky Very Large Array (VLA) to take advantage of a helping hand from nature to detect a distant galaxy that likely is the faintest radio-emitting object yet found.
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MGTC J095959.63+024608.6 and MGTC J100016.84+015133 were found with the powerful MeerKAT telescope (I. Heywood, Oxford/Rhodes/SARAO)
Astronomers have discovered two cosmic beasts in a small patch of sky. Dwarfing the Milky way, the two new radio galaxies are thought to be among the largest single objects in the universe.
Whereas normal radio galaxies are fairly common, only a few hundred of these have radio jets exceeding 700 kilo-parsecs in size, or around 22 times the size of the Milky Way. The latest research shows the discoveries – named MGTC J095959.63+024608.6 and MGTC J100016.84+015133.0 – are more than 2 Mega-parsecs across: about 6.5 million light-years or about 62 times the size of the Milky Way. These “truly enormous systems” are dubbed “giant radio galaxies,” say authors.