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JWST noticed an unimaginable variety of supernovae within the early universe

June 17, 2024
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JWST noticed an unimaginable variety of supernovae within the early universe
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Most of the circled objects characterize beforehand unknown supernovae

NASA, ESA, CSA, STScI, JADES Collaboration

Astronomers utilizing the James Webb Area Telescope (JWST) have discovered an astonishing variety of supernovae within the distant universe, together with the farthest ever confirmed. Their discoveries have elevated the quantity of recognized supernovae within the early universe by an element of 10.

The researchers discovered 79 new supernovae by taking two pictures of the identical tiny patch of the sky, one in 2022 and one in 2023. “It’s really so small that for those who took a grain of rice and held it at arm’s size that might be the dimensions of the patch,” mentioned Christa DeCoursey on the College of Arizona whereas presenting this work at a gathering of the American Astronomical Society in Wisconsin on 10 June. “We spent over 100 hours of JWST [observing] time on every picture, so these are very, very deep pictures.”

The astronomers then in contrast the 2 pictures with each other and with photos of the identical space taken beforehand by the Hubble Area Telescope, on the lookout for shiny spots that had been current in a single picture however not the others.

These spots are stars that had been shining comparatively dimly earlier than exploding in shiny supernovae and fading out. A number of of them are candidates for essentially the most distant supernova ever discovered, though their distances haven’t but been confirmed. And one is unquestionably essentially the most distant ever confirmed – it blew up when the universe was solely about 1.8 billion years previous.

Supernovae like these most likely created the heavy components that at the moment are unfold all through the universe, so that they include fewer of those components than fashionable supernovae do. “The universe was basically completely different at this early section than the occasions that Hubble, and notably ground-based surveys, had been probing prior to now,” mentioned Justin Pierel on the Area Telescope Science Institute in Maryland through the presentation. “That is actually a brand new regime that JWST has opened.” Observations in that regime might assist reveal what the primary stars had been like.

Subjects:

  • stars/
  • James Webb house telescope



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