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News and Views
Nature 443, 283-284 (21 September 2006) | doi:10.1038/443283a; Published online 20 September 2006
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Astronomy: Champagne supernova
David Branch1
Abstract
Thermonuclear supernovae were thought to occur only when white-dwarf stars of a certain mass explode. The discovery of a supernova that is way over the mass limit might require a reworking of the model.
According to the conventional view, thermonuclear, or type Ia, supernova explosions occur when a white-dwarf star — a star that has exhausted its nuclear fuel and is composed entirely of carbon and oxygen — accretes matter from a close companion star. At the same time, the white dwarf contracts, and so its density and temperature increase.
- David Branch is in the Homer L. Dodge Department of Physics and Astronomy, University of Oklahoma, Norman, Oklahoma 73019, USA.
Email: branch@nhn.ou.edu
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