Post Tagged with: "Reionization"

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  March 26, 2025 / News in Danish

  James Webb opdager tidligste tegn på at Universet bliver gennemsigtigt

  Universets første galakser blev født indhyllet i en “tåget” gas, og kunne ikke ses tydeligt før denne tåge var lettet. Ved hjælp af rumteleskopet James Webb har et internationalt hold af forskere, ledet af astronomer ved Cosmic Dawn Center i København, opdaget det hidtil fjerneste — og dermed tidligste — tegn på denne vigtige epoke i Universets historie. En galakse set kun 330 millioner år efter Big Bang har dannet en boble af gennemsigtigt gas omkring sig og afslører dermed, at denne epoke begyndte tidligere end vi troede. Resultatet er blevet publiceret i det prestigefyldte tidsskrift Nature.

   
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  March 26, 2025 / News from DAWN

  James Webb discovers earliest sign of the Universe becoming transparent

  The first galaxies in the Universe were born enshrouded in a “foggy” gas, and could not be seen clearly until they had cleared up this fog. Using the James Webb Space Telescope, a team of researchers led by astronomers at the Cosmic Dawn Center in Copenhagen has now detected the hitherto most distant — and hence earliest — sign of this important epoch in the history of the Universe. A galaxy, seen only 330 million years after the Big Bang, has formed a bubble of transparent gas around itself, revealing that the epoch began earlier than thought. The result has been published in the prestigious journal Nature.

   
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  May 28, 2024 / News from DAWN

  Invisible Galaxies, Through a Scientist’s Eyes

  Glimpsing into the galaxies of the past: that is the daunting task that students from the University of Copenhagen have undertaken by analysing so-called Lyman-α emission. While this radiation, stemming from hydrogen, is difficult to observe, investigating alternative quantities from light spectra can depict a more accurate representation of early galaxies and their characteristics.

   
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