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Unformatted text preview: 11.30.2007 astronomy Neutron Stars Produced in Type I I, NOT type IA, supernovae Very small, rotate very quickly, very strong gravity and magnetic fields Xray Binaries Ignites every few hours The jets can reach speeds of onequarter the speed of light Speed increases to millisecond pulsars (hundreds of rotations per second) At the equator, i t's spinning at about 20% the speed of light Black Holes If mass is greater than 30 solar masses, you skip the neutron star Mass of n core is about 3 or more solar masses 3 solar masses is what's required for gravity to beat neutron degeneracy pressure Escape speed: Vesc = 2GM/R Earth R = 1 cc Vesc = c We cannot see singularities: "no naked singularities" The boundary is called the event horizon (purely mathematical) point of no return for light Rs = 2GM / c2 3 km (M / solar mass) Collapsing neutron star Mass R Rs ...
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This note was uploaded on 09/24/2009 for the course ASTR 101 taught by Professor Christiansen during the Fall '08 term at UNC.
 Fall '08
 Christiansen
 Astronomy, Neutron Stars

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