What do you think of this Supernova early warning system?
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Liverpool John Moores Üniversitesi ve Montpellier Üniversitesi’ndeki gökbilimciler, büyük bir yıldız bir süpernova patlamasıyla yaşamını sona erdirmek üzereyken alarm verecek bir “erken uyarı sistemi” geliştirdiler. Bu çalışma Royal Astronomical Society’nin aylık bildirisinde yayınlandı.
In the new study, researchers found that massive stars (typically eight to 20 times the mass of the Sun) in the final stage of their lives, known as the “red supergiant” stage, have been observed in visible light by about 100 in the past few months. I found it suddenly darkened several times. before dying. This dimming is caused by the sudden accumulation of material around the star, obscuring its light.
It was not previously known how long it took the star to accrete this material. Now, for the first time, researchers have simulated what a red supergiant star nested in these ‘cocoons’ might look like before it explodes.
Old telescope archives show images of stars exploding about a year after they were taken. The stars look normal in these images. That means we may not have built a theoretical circumstellar cocoon yet. This suggests that the cocoon was assembled in less than a year, which is considered very fast.
Benjamin Davis of Liverpool John Moores University and lead author of the paper said: This means that the day before the star exploded, we probably couldn’t see it there. , you can see them literally ripped apart right in front of your eyes. ”
More information: Ben Davies et al, Explosion imminent: the appearance of red supergiants at the point of core-collapse, Monthly Notices of the Royal Astronomical Society (2022). DOI: 10.1093/mnras/stac2427
Journal information: Monthly Notices of the Royal Astronomical Society
Provided by Royal Astronomical Society
