Brightest supernova ever seen shines twice as bright as any other

"Not only is it brighter than any other supernova we've ever seen, but it has several properties and features that make it rare in comparison to other explosions of stars in the universe".

Now an global team of astronomers, led by University of Birmingham scientists, believes that a rare occurrence that was possibly triggered by two massive stars which merged before the explosion has led to "the most light we have ever seen emitted by a supernova".

The latest astronomical event marks the first time it's been seen by astronomers.

Nicholl is lead writer of a paper on the find published Monday in Nature Astronomy.

"We determined that in the final years before it exploded, the star shed a massive shell of gas as it violently pulsated", said Matt Nicholl, lecturer in gravitational wave astronomy at the University of Birmingham, and study lead author, in the statement.

SN2016aps outshone normal supernova explosions by 500 times, the researchers said.

Such supernovas only emit 1.0 per cent of their energy in visible light, but SN2016aps emits a far greater proportion and is thought to contain the energy equivalent to a record 200 trillion trillion gigatons of TNT.

The researchers believe the supernova was initially formed from the merging together of two suns due to the unusually high amount of hydrogen contained in the explosive cloud.

144 confirmed cases of COVID-19 in H-N
Brillinger says staffing levels are still critically low after all but a handful of workers walked off the job on Friday. Twelve residents of a County Durham care home have now died after displaying symptoms of coronavirus .

"While many supernovae are discovered every night, most are in massive galaxies", said Dr Peter Blanchard, from Northwestern University and a coauthor on the study.

The scientists continued their observation of the supernova because it was, according to them, found in the middle of nowhere.

Astronomers observed the explosion for two years until the dying star faded to one percent of its peak brightness.

The scientists watched the explosion for 2 years and have been capable of decide that its mass was as a lot as 100 instances that of our solar's mass, and 5 to 10 instances extra huge than a typical supernova. Typically supernovae have masses of between 8 and 15 solar masses. Before they explode, doomed giant stars experience violent pulsations, which eject such shells into space. Enormous stars tend to release large amounts of nuclear energy at their core, increasing its temperature. "The gas we detected was mostly hydrogen - but such a massive star would usually have lost all of its hydrogen via stellar winds long before it started pulsating". "The new star, borne of the merger, was heavy with hydrogen and also high enough in mass to trigger pair instability".

"Finding this extraordinary supernova couldn't have come at a better time", according to Professor Edo Berger, a coauthor from Harvard University.

He and his colleagues found the supernova, called SN2016aps, using the Panoramic Survey Telescope and Rapid Response System in Hawaii.

The research was funded through a Royal Astronomical Society Research Fellowship, along with grants from the National Science Foundation, NASA and the Horizon 2020 European Union Framework.

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