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Unformatted text preview: Geology 360 4/9/08 Chandrasekhar • Electron degeneracy pressure • Limit 1.44 solar masses • 1983 Nobel prize White dwarves • Remnants of low-mass stars • Composed of carbon or He • Supported by electron degeneracy pressure • Can’t be bigger than 1.4 solar masses • Cool off to become “ black dwarfs” • White dwarves in close binary systems can steal mass from their companion star, gains H and He • If it passes 1.4 solar masses H collapses and detonates its carbon • Causes a type I supernova (exploding his mass star is type II) Measuring Distance to more distant stars: Brightness=luminosity divided by 4 distance squared π ***method of standard candles: using a known luminosity and measured brightness to determine distance. 4/11/08 Neutron Stars • A big ball of neutrons (~10% protons), like a gigantic atomic nucleus • 1.4-3 solar masses~ 6km across1....
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This note was uploaded on 04/18/2008 for the course GEO 360 taught by Professor Preston during the Spring '08 term at Indiana State University .
- Spring '08