Sunday, 23 September, 2018

Supermassive black hole emits a ferocious 'double burp'.

Supermassive Black Hole is Caught Letting Out Massive 'Burps' Evidence of Black Holes Feeding in Cycles Described Graphically as Repeated Burps
Frank Williams | 13 January, 2018, 19:30

Julie Comerford, from the University of Colorado, said: "Black holes are voracious eaters, but it turns out they don't have very good table manners".

A supermassive black hole in a distant galaxy gobbled up gas - then released two "burps" in the form of blasts of high-energy particles.

Black holes are incredibly powerful gravity wells that absorb anything and everything that gets too close.

By comparing X-ray images from Chandra and visible-light (optical) images from Hubble, the team found that in the past, the supermassive black hole in J1354 appears to have consumed, or accreted, large amounts of gas while blasting off an outflow of high-energy particles.

The black hole of SDSS J1354+1327 is particularly well fed: cosmic gas is being spewed out by a nearby galaxy, which flows in part into SDSS J1354+1327, and straight into the black hole's hungry mouth.

When scientists looked at the Hubble's data, they got to know that a cloud of blue-green hot is extending away from the black hole which indicated that a burp had occurred earlier.

Supermassive black holes, which can have the mass of 100 suns, are found at the centre of almost all big galaxies.

'If our Milky Way's black hole became active again, we are far enough away from it that we would be fine.

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But the astronomers found a little loop in the images; the sign of a new belch emerging from the cosmic sinkhole.

She went on: "This new burp is actually moving like a shockwave that is coming out very fast". But when they were analyzing at a black hole burp that occurred nearly 100,000 years ago, they found out another new belch coming out from the same cosmic sinkhole.

"Right now, our galaxy's supermassive black hole is firmly in the nap phase of the feast-burp-nap cycle, but it's just waiting for its next meal to come along", Comerford said.

This then allowed researchers to pinpoint the location of its central black hole.

"Theory predicted that black holes should flicker on and off very quickly and this galaxy's evidence of black holes does flicker on timescales of 100,000 years - which is long in human timescales, but in cosmological timescales is very fast", said Julie Comerford. This happens especially if the main feed of the black hole is gas. This would provide plenty of cosmic gas on which a black hole could feast.

The black hole Comerford imaged is getting its fuel from a companion galaxy next door - the two are exchanging a stream of stars and gas after recently colliding.

As the researchers analysed the first burp, they saw another burst of radiation from the black hole, this time north of the super dense object.

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