Washington: Scientists have observed the largest supernova explosion (stellar explosion) ever. In a distant galaxy, the violent death of a huge star is one hundred times more massive than our sun.
Scientists say that the energy released by supernovae is twice that of any other star explosion observed so far, occurring in the Milky Way, about 4.6 billion light years from Earth. Light years are the distance light travels in a year, or 5.9 trillion miles (9.5 trillion kilometers).
They added that it may represent a supernova, which has not been theoretical until now.
Matt Nicholl, an astrophysicist at the University of Birmingham in the UK, said that two very large stars-each about 50 times the mass of the sun-may merge into a very large one about 1,000 years before the explosion Stars. They used to be part of a so-called binary system in which two stars are gravitationally connected to each other.
The merged star exploded in a supernova (formally named SN2016aps) in a very dense and hydrogen-rich envelope.
The lead author of the study, Nicole, said: “We discovered that the reason why supernovae can become so bright is because of a strong collision between the debris ejected by the explosion and the gas shell that the star threw away a few years ago.” “Astronomy” weekly.
The star will die in various ways depending on its size and other characteristics. When a huge star with a mass more than eight times the mass of our sun runs out of fuel, it will cool down, its core will collapse, trigger a shock wave, and make its outer layer explode so violently that the entire galaxy cannot shine. .
The researchers observed the explosion for two years until it decreased to 1% of its maximum brightness, and they said this may be an example of an extremely rare “pulse-to-unstable” supernova.
“Pulsational pair-instability is when very massive stars undergo pulsations which eject material away from the star,” said study co-author Peter Blanchard, a postdoctoral fellow in astrophysics at Northwestern University in Illinois.
“This discovery shows that there are many exciting and new phenomena left to be uncovered in the universe,” Blanchard added.
Very massive stars like this one were probably more common early in the universe’s history, Nicholl said.
“The nature of those first stars is one of the big questions in astronomy,” Nicholl added. “In astronomy, seeing things further away means looking back further and further in time. So we might actually be able to see the very first stars if they explode in a similar manner to this one. Now we know what to look for.”