Urca process


dcterms modified equal to or less than 2020-11-19T16:52:13.894Zequal to or more than 2020-11-19T16:52:13.894Z
http://astrothesaurus.org/uat/1100 original
1752 original
http://astrothesaurus.org/uat/96 original
1752 original
definition A cycle of nuclear reactions, primarily among the iron group of elements, accompanied by a high rate of neutrino formation. Neutrinos carry away energy quickly leading to the cooling of the stellar core and a dramatic drop in the pressure. Due to this process in pre-supernova stars, the core becomes unable to support the weight of the overlying layers. These layers collapse onto the core and subsequently rebound and escape in the supernova explosion.
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contributor AAS_Frey.Katie original