Tech & Science : Rare star explosion gave rise to the gold in your electronics, study says - PressFrom - Australia
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Tech & Science Rare star explosion gave rise to the gold in your electronics, study says

13:06  14 june  2019
13:06  14 june  2019 Source:   cnet.com

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Ironically, said Siegel, his team began working to understand the physics of that merger before their simulations pointed toward collapsars as a heavy element birth Since then, scientists have added many more elements to the periodic table, a staple of science textbooks and classrooms worldwide.

Ironically, said Siegel, his team began working to understand the physics of that merger before their simulations pointed toward collapsars as a heavy What collapsars lack in frequency, they make up for in generation of heavy elements, said Siegel. Collapsars also produce intense flashes of gamma rays.

Rare star explosion gave rise to the gold in your electronics, study says© CNET

Artist's impression of a collapsar showering the universe with shiny things.

It has been thought that valuable heavy elements like gold and platinum were created by massive cosmic collisions involving neutron stars or black holes, but a new finding suggests the gold on your ring finger or in your electronics might have really come from a rare supernova explosion that also gives birth to a black hole in the process.

The epic blast is called a "collapsar" and occurs when a very old and massive star collapses in on itself and implodes, leaving behind a brand-new black hole.

Physicist Daniel Siegel from the University of Guelph in Toronto worked with colleagues from Columbia University to model how collapsars eject heavy elements into the universe.

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"Our study shows that superflares are rare events," said Notsu, a researcher in CU Boulder's Laboratory for Atmospheric and Space Physics. Over a series of studies , the group used those instruments to narrow down a list of superflares that had come from 43 stars that resembled our sun.

Gold — atomic number 79, element symbol Au, the most widely beloved of the precious metals — might have its origin in extremely These explosions make an astonishing amount of heavy atoms. Berger’s calculations show that the neutron- star origin can account for all the gold in the universe.

"Eighty percent of these heavy elements we see should come from collapsars," Siegel said in a release. "Collapsars are fairly rare in occurrences of supernovae, even more rare than neutron star mergers -- but the amount of material that they eject into space is much higher than that from neutron star mergers."

A paper explaining the result was published Thursday in the journal Nature.

Next the team would like to see its theoretical model backed by observations in the actual universe, perhaps by the upcoming James Webb Space Telescope, which should be able to detect signs of collapsar-forged heavy elements in a far-off galaxy.

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Storm clouds from Donald Trump's trade war with China could see the sun rise on a new industry for Australia. © ABC Northern Minerals boss George Bauk leads politicians around the company's rare earths plant. In the tit-for-tat trade war, China has made veiled threats to withhold access to its processed rare earths. That has seen the US and other Western countries scrambling to find new, reliable sources of the 17 minerals vital for everything from iPhones to fighter jets. Processing rare earths is expensive and polluting so, up to now, it has been something developed nations have been happy to send offshore.

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