Violent cosmic explosion produces high-energy gamma-ray burst will always be recognized – CNET

Violent cosmic explosion produces high-energy gamma-ray burst always CNET

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The Hubble Space telescope snapped images of the gamma-ray burst in February and March 2019.


NASA/ESA/V. Acciari et al. 2019

If a massive star, many times bigger than our sun, collapsed in a black hole, there is an almost inconceivable amount of energy. The huge explosions, known as gamma-ray bursts, produce generally the same amount of energy, which is our sun  over its entire life. , astronomers recently there were two GRBs in the distant cosmos rays of the highest energy ever seen, opened a new path to the understanding of the violent, explosive phenomena. 

In a series of three publications, published in the journal ” Nature, Nov. 20, a collaboration of international researchers from around the world reports of the extreme emission profiles of two bursts: GRB 190114C and GRB 180720B. In General, GRBs, low-energy emit seen rays in the kilo-electro volt (keV) range, and the astronomers have, how they produce bursts under the 100-gigaelectronvolt (GeV) range, but measurements of GRB 190114C are up to 10 times higher, landing between 0.2 and 1 teraelectronvolt (TeV).  

The Large Hadron Collider, the particle speeds up work and she breaks down, at about 13 TeV, accelerates protons to around 6.5 TeV each. A neutron star lurking in the center of the crab nebula shoot gamma-ray energy at around 450 TeV

This has been discovered for the first time TeV gamma-rays from a gamma-ray burst.

“The theory is to produce all of the GRB TeV gamma-rays, but our technology is now advanced enough for us to detect this emission, before it fades,” said Gemma Anderson, an astronomer at the International Centre for Radio Astronomy Research and co-author of one of the studies.

GRB 190114C first was picked up by two space telescopes, NASA’s Neil Gehrels, Swift Observatory, and the Fermi Gamma-ray Space Telescope, Jan. 14, 2019. To check seconds later, telescopes in Spain under the control of the Major Atmospheric Gamma Imaging Cherenkov cooperation swung around by the Explosion. The MAGIC collaboration pinged researchers around the world to keep your eye on the event, looking at it in a number of different wave-radio -, infrared -, optical-and the X-lengths of radiation. 

“All of the GRB, astronomers around the world were very excited because it was the first time something like this had been announced,” said Anderson.

Anderson and other researchers in Australia, the Australia Telescope Compact Array is contacted for the monitoring of the event and the “afterglow”, the time of the emission after the initial outbreak. The cooperation with the South African SKA Pathfinder telescope, Anderson and her team studied the low-and high-radio-frequency emission from GRB 190114C.

bundling all the data together, the spectrum of the emissions are recorded and analyzed. The results were able to prove a longstanding theory about the types of radiation, generated in a GRB. In an accompanying Nature piece, Bing Zhang, a physicist at the University of Nevada, called it “a revolutionarytionary discovery.”

The teams continue to monitor the outbreaks in the entire 2019, but Anderson notes that much the let of the higher energy light is already fading. “We are only now detects very low-energy radio-light, but soon it will be completely faded, so that we can see is the optical and radio light of the galaxy,” she said. 

And for Anderson and her team, it is looking a lot more violent cosmic explosions. 

“If all GRBs produce TeV gamma-ray is one of the great scientific questions that we’ll explore now.”


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Released on Wed, 20 Nov 2019 18:15:01 +0000

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