Extremely large WISE galaxy has also the biggest black hole in the universe

This galaxy according to scientists, is the brightest ever discovered. It has a luminosity which is equivalent to 300 trillion stars. That’s pretty big compared to our Milky Way which is only able to garner billions of stars.

The galaxy is a new comer which was discovered recently using NASA’s Wide-field infrared Survey Explorer or WISE- christened extremely luminous infrared galaxies or ELIRGs

“We are looking at a very intense phase of galaxy evolution,” said Chao-Wei Tsai of NASA’s Jet Propulsion Laboratory in Pasadena, California.

“This dazzling light may be from the main growth spurt in the size of the galaxy’s black hole,” said Tsai, lead author of the research appearing in The Astrophysical Journal.

The new galaxy called as WISE J224607.57-052635.0 may have a gargantuan black hole right at its belly sucking all the gas it can manage, researchers revealed.

Ultra large black holes expands by siphoning gas and matter into a disk that forms around them. The heat then sizzles to a very high temperatures of million degrees bombarding highly visible ultraviolet energy and x-ray light.

The light is filtered by the several layer of dust which upon heating up gives off infra-red beams.

Immense black holes are common at the cores of galaxies, but finding one this big so far back in the cosmos is rare, researchers said.

Giant black holes are commonly found at the center of galaxies but this black hole is something of a rare find in any galaxies.

It takes the 12.5 billion light years for lights from black holes to reach us, so what we are seeing now is really something that belongs to the past.

The black hole would have grown to billions of times compared to our sun when Milky Way was only a tenth of its present size now.

“The massive black holes in ELIRGs could be gorging themselves on more matter for a longer period of time. It’s like winning a hot-dog-eating contest lasting hundreds of millions of years,” said Professor Andrew Blain from the University of Leicester.

The latest research reported a total of 20 ELIRGs, which includes the most luminous galaxy found to date.

These galaxies which are considered even more luminous than the most luminous infra-red galaxies or  ULIRGs found in the past, were not discovered because  of the distance and also because dusts changed their powerful visible light into an amazing outburst or infra-red light.

“We found in a related study with WISE that as many as half of the most luminous galaxies only show up well in infrared light,” Tsai added.

Image: http://annesastronomynews.com/

Source: http://www.financialexpress.com/article/lifestyle/science/most-luminous-galaxy-in-universe-discovered/74853/


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