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Times Now Digital
Updated Jul 08, 2021 | 16:55 IST
Representational image.
Representational image.  |  Photo Credit: iStock Images

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  • Simply put, any element heavier than iron requires immense forces to be created. We've come to learn that the merger of neutron stars and the collapse of massive stars via supernova explosions are two ways this can take place
  • The researchers found that the star in question had a chemistry – low levels of iron content coupled with high volumes of nitrogen, zinc, europium and thorium – that suggested a different origin of heavy elements than the usual neutron star merger
  • The study suggests that such hypernovae may have had a greater role to play in shaping the chemical composition of the Milky Way than previously believed

The unusual composition of a star in our galaxy may reveal clues around a type of stellar explosion that took place in the early universe, a team of astronomers contend in a recently published study in Nature. Importantly, it may facilitate a greater understanding of the various ways in which the heavy elements observed in the universe came to be. ,live24-com

The star at the heart of the study – SMSS J200322.54-114203.3 – is around 7,500 light years from our Sun, located in the halo of the Milky Way. The researchers believe that a massive stellar explosion – far more powerful than a supernova – known as a 'hypernova' was responsible for its peculiar makeup. ,best-kabaddi-player-in-the-world

rugby-league-kicking-tee,Simply put, any element heavier than iron requires immense forces to be created. We've come to learn that the merger of neutron stars and the collapse of massive stars via supernova explosions are two ways this can take place. 

basketball-quotes-of-the-day,Heavy elements originate when lighter ones absorb a great deal of neutrons, some which eventually decay into protons, and inevitably produce a stable isotope of a heavy element. The force of a supernova explosion or a stellar merger then shoots these elements out into the cosmos where they are ultimately sucked into other stars or onto planets like our own Blue Dot. 

gopher-volleyball-tv-schedule-2019,But the researchers found that the star in question had a chemistry – low levels of iron content coupled with high volumes of nitrogen, zinc, europium and thorium – that suggested a different origin of heavy elements than the usual neutron star merger. 

Responding to Gizmodo, Dr David Yong, a researcher at the Australian National University and lead author of the paper noted, “The mergers of neutron stars (the extremely dense remnants of massive stars) were recently confirmed as sources...Our results reveal magentorotational hypernova (an energetic explosion of a rapidly rotating star with magnetic fields) as another source of those heavy elements.” ,play-real-football-2019-online

There was a certain profile of star the team was looking for. Specifically, they were in search of stars which had high levels of heavy elements like europium, thorium and zinc. Using the SkyMapper Southern Sky Survey, a map of around 600 million cosmic objects in the night sky, the researchers scanned through some 26,000 stars until they found the perfect candidate. SMSS J200322.54-114203.3 seemed to have significantly higher levels of heavy elements than it ought to based on predicted rates and energies of star collapses. 

handball-history-timeline,The researchers believe that the star formed around 13 billion years, early in the universe's history, borne out of a gargantuan hypernova. Hypernova are stellar explosions that release energy more than ten times that of a typical supernova. “Since the star has such low iron content, it must have formed when the Milky Way galaxy was very young. Given the short time constraint, it is easier to produce all elements in a single event (magnetorotational hypernova) rather than in the neutron star merger scenario,” added Dr Yong. 

The study suggests that such hypernovae may have had a greater role to play in shaping the chemical composition of the Milky Way than previously believed. The challenge now is to discover more of such stellar objects to deepen our understanding of what really took place in the early moments of the universe and how it affects what we observe today. ,cricket-insect-arabic

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