Home > Astronomy, Astrophysics, Gamma Ray Bursts, General Astronomy, Supernovae, X-Rays > X-ray Vision Can Reveal The Moment Of Birth Of Violent Supernovae

X-ray Vision Can Reveal The Moment Of Birth Of Violent Supernovae


GRB 080913, a distant supernova detected by Swift. Credit: NASA/Swift/Stefan Immler

GRB 080913, a distant supernova detected by Swift. Credit: NASA/Swift/Stefan Immler

A team of astronomers led by the University of Leicester has uncovered new evidence that suggests that X-ray detectors in space could be the first to witness new supernovae that signal the death of massive stars. Astronomers have measured an excess of X-ray radiation in the first few minutes of collapsing massive stars, which may be the signature of the supernova shock wave first escaping from the star.

The findings have come as a surprise to Dr Rhaana Starling, of the University of Leicester Department of Physics and Astronomy, whose research is published in the Monthly Notices of the Royal Astronomical Society, published by Oxford University Press.

Dr Starling said: “The most massive stars can be tens to a hundred times larger than the Sun. When one of these giants runs out of hydrogen gas it collapses catastrophically and explodes as a supernova, blowing off its outer layers which enrich the Universe. But this is no ordinary supernova; in the explosion narrowly confined streams of material are forced out of the poles of the star at almost the speed of light. These so-called relativistic jets give rise to brief flashes of energetic gamma-radiation called gamma-ray bursts, which are picked up by monitoring instruments in Space, that in turn alert astronomers.”

Full Story: http://www.ras.org.uk/news-and-press/219-news-2012/2199-x-ray-vision-can-reveal-the-moment-of-birth-of-violent-supernovae
Also: http://www2.le.ac.uk/news/blog/2012/december/x-rays-could-provide-early-warning-of-supernovae

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