11.30.2007 - astronomy

11.30.2007 - astronomy - 11.30.2007 astronomy Neutron Stars...

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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 X-ray Binaries Ignites every few hours The jets can reach speeds of one-quarter 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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