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Tuesday, January 17, 2012

Supernova eats white dwarfs


Composite image of supernova remnant SNR 0509-67.5
"Two astronomers in the US have found a Type 1a supernova that did not leave behind a surviving companion star after it exploded. Instead, they conclude that the supernova was caused by two white-dwarf stars colliding and then both stars being consumed in the conflagration. Although the observation is of just a single supernova, the discovery adds weight to the theory that at least some Type 1a supernovae are the result of such collisions."
in PhysicsWorld 

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