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Nature 451, 775-777 (14 February 2008) | doi:10.1038/451775a; Published online 13 February 2008
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Astrophysics: A story of singular degeneracy
Edward P. J. van den Heuvel1
Abstract
Astronomers have a choice of two models of how type Ia supernovae arise. The progenitor for one of these huge stellar explosions has now been discovered, bringing a definitive judgement a little closer.
On page 802 of this issue, Voss and Nelemans1 report that they have found a luminous source of low-energy X-rays at just the position where, on 5 November last year, the type Ia supernova SN2007on was sighted. The discovery, made in archive data from NASA's Chandra X-ray-observatory satellite, is the first-ever detection of the progenitor of a supernova of this class.
- Edward P. J. van den Heuvel is at the Astronomical Institute "Anton Pannekoek" and the Center for High Energy Astrophysics, University of Amsterdam, Kruislaan 403, 1098SJ Amsterdam, the Netherlands.
Email: edvdh@science.uva.nl
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