Wednesday, April 17, 2013

ScienceDaily: Black Holes News

ScienceDaily: Black Holes News


Dying supergiant stars implicated in hours-long gamma-ray bursts

Posted: 16 Apr 2013 03:00 PM PDT

Three unusually long-lasting stellar explosions discovered by NASA's Swift satellite represent a previously unrecognized class of gamma-ray bursts. Two international teams of astronomers studying these events conclude that they likely arose from the catastrophic death of supergiant stars hundreds of times larger than the sun.

Strange new bursts of gamma rays point to a new way to destroy a star

Posted: 16 Apr 2013 11:47 AM PDT

Scientists have pinpointed a new type of exceptionally powerful and long-lived cosmic explosion, prompting a theory that they arise in the violent death throes of a supergiant star.

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