SCI 102 Lecture Notes - Lecture 15: Neutron Star, Neutrino, Atomic Nucleus
13 Apr 2016
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11. the elements > hydrogen in our bodies etc came from the violent death of a star/stars. Massive stars live for a few million years, but go supernova in seconds. A supernova event can shine 108 x brighter than the progenitor star. A sn event may out-shine its home galaxy. The bright ejecta grow more diffuse and dim over a few years. We observe a few supernovae in our mw galaxy. Only ~ 5% of stars have sufficient mass. The sn event is relatively short lived. The mw is a very dusty galaxy. We observe ~ 2 sn every hundred years in other galaxies. 1054 ad chinese guest star as bright as our full moon. 1572 observed by tycho brahe some remnants remain. 1967 jocelyn bell studying quasars: detected rapid fluctuations in radio intensity every 1. 3 seconds, source nicknamed pulsar . Pulsar = neutron star = the collapsed core remnant of a supernova explosion.
