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Space & Astronomy

Astronomers watch red supergiant star explode for the first time

January 7, 2022 | Comment icon 12 comments



An artist's impression of the star. Image Credit: W. M. Keck Observatory / Adam Makarenko
In a world first, astronomers have had the opportunity to watch a red supergiant exploding in real time.
It's one of the most destructive events in the known universe - the demise of a supergiant star in the form of a colossal explosion of cosmic proportions - and now, for the first time, astronomers have been given a front-row seat to such an event happening right in front of their eyes.

The scientists first began to observe the star - which is situated 120 million light-years away in the NGC 5731 galaxy - back in summer 2020, but were surprised to discover a few months later that it had exploded.

By pulling together observations from multiple telescopes, the researchers were able to build up a picture of the supernova from before it exploded to a full year afterwards.

"This is a breakthrough in our understanding of what massive stars do moments before they die," said study lead author Wynn Jacobson-Galan from the University of California Berkeley.
"For the first time, we watched a red supergiant star explode!"

The team is now hoping to spot further examples to help them learn more about supernovae.

"It's like watching a ticking time bomb," said study senior author Raffaella Margutti.

"We've never confirmed such violent activity in a dying red supergiant star where we see it produce such a luminous emission, then collapse and combust, until now."

Source: Space.com | Comments (12)


Recent comments on this story
Comment icon #3 Posted by L.A.T.1961 11 days ago
In theory a big amateur scope could see it but in practice it would be a difficult optical target. A scope with camera (long exposure) would see it, once located.  Its in the constellation Boötes and the host galaxy (NGC 5731) is brightness Mag 14. 
Comment icon #4 Posted by L.A.T.1961 11 days ago
It did not look big enough (10-12 solar mass) to form a black hole ? Other option is a neutron star. 
Comment icon #5 Posted by Jon the frog 11 days ago
So i'm waiting for pictures ! Will find some for sure !
Comment icon #6 Posted by L.A.T.1961 11 days ago
This is the best I could find -  
Comment icon #7 Posted by Still Waters 10 days ago
Astronomers have for the first time imaged the last moments in the life of a red supergiant star. Red supergiant was watched for 130 days before it collapsed - and scientists recreated the supernova. https://news.sky.com/story/astronomers-spot-dying-star-just-before-it-explodes-and-record-supernova-12510823 0:25 video
Comment icon #8 Posted by qxcontinuum 9 days ago
I don't quite understand since what has been seen now has probably happened thousands if not million of years ago. How can they observe the sun intact, then years later it's gone in an explosion unless what they saw, already happened long time ago and they were just lucky to capture its long dead projection.
Comment icon #9 Posted by Phil1684 9 days ago
  This is old news. It happened 120 million years ago. 
Comment icon #10 Posted by Abramelin 8 days ago
No, for those who, like us, observed it for the first time it is news, despite it must have happened many millions of years ago.
Comment icon #11 Posted by L.A.T.1961 8 days ago
Exactly.  
Comment icon #12 Posted by Manwon Lender 5 days ago
For the first time ever, astronomers have imaged in real time the dramatic end to a red supergiant's life -- watching the massive star's rapid self-destruction and final death throes before collapsing into a type II supernova. Led by researchers at Northwestern University and the University of California, Berkeley (UC Berkeley), the team observed the red supergiant during its last 130 days leading up to its deadly detonation. https://www.sciencedaily.com/releases/2022/01/220106143653.htm


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