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Home / chile / The NASA telescope opens a disc that "should not exist" near a black hole – BBC News

The NASA telescope opens a disc that "should not exist" near a black hole – BBC News



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14.07.2019

If the black holes were not mysterious enough, NASA Hubble's telescope found an unexpected disk of material that revolved around one of them.

The massive black hole in question is located in the center of the NGC 3147 galaxy, located on 130 million light-years,

According to NASA, the unexpected presence of a disk so close to a black hole offers a unique opportunity for testing theoryyou of relativity by Albert Einstein.

But why is this album so mysterious?

Black hole "hungry"

In principle, according to current astronomical theories, this disk of material – is called accretion disc– It should not be there.

At least not near the "hungry" black hole, as it is classified in this galaxy.

Black holes in some types of galaxies like NGC 3147 are "hungry" because there is not enough material gravitationally captured to feed them regularly.

This type of black holes usually do not form discs of material.

That's why it's "very disturbing" that there is one around a hungry black hole that mimics the most powerful discs found in extremely active galaxies with a giant black hole.

"We did not expect to exist," said Stefano Bianchi, author of the study.

"This is the same kind of disk we see in objects that are 1000 or even 100,000 times brighter".

Astronomers initially chose this galaxy to validate models of low-light active galaxies, those with hungry black holes.

How is it formed?

The patterns predict that the accretion disk is formed when large amounts of gas are trapped by the strong gravitational attraction of a black hole.

This question radiates a lot of light.

Once less material is inserted into the disc, it becomes weaker and changes the structure.

"The projections of current gas dynamics models in very weak active galaxies have clearly failed," Bianchi said.

The disk is so deeply integrated into the intense gravitational field of the black hole that the light of the gas disk has been modified, according to Einstein's theory of relativity, which offers astronomers a unique look at processes close to a black hole,

What is Einstein's theory of relativity and why was it so revolutionary?

"This is an intriguing look at a disk very close to a black hole, so close that the velocities and intensity of the gravitational force affect the appearance of photon light," said Stefano Bianchi, author of the study.

"We have never seen the effects of general and special relativity in the visible light so clearly," said Marko Kieberge, also a study member.

The team hopes this with Hubblein the future they will find discs of material around the hungry black holes in similar active galaxies.


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