Celestial lighthouses

Celestial lighthouses - work The Crab Pulsar o Compact...

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Celestial lighthouses Pulsars – Neutron stars o Beam of particles and radiation produces a brief pulse o Can pulse over entire EM spectrum o Extremely regular Rotational Breakup – how pulsars work o Rapid rotation produces a centrifugal force which opposes gravity o Breakup velocity for a rotating object is the rotational velocity at which the centrifugal force equals the force of gravity o WD have much higher breakup velocity Need large mass and small radius for a pulsar to
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Unformatted text preview: work The Crab Pulsar o Compact x-ray emitting object: a neutron star o Radio, optical, X-ray pulsations o Rotation period P=33 milliseconds Pulses 30 times per second o Rotation of pulsar and its magnetic field transfers energy to nebula o Energy loss means loss of angular momentum - pulsar slowing down o Particles acceleration generated close to pulsar forms o Pulse period increases with time Glitches o Sometimes pulse periods suddenly decrease...
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This note was uploaded on 03/16/2011 for the course ASTR 002 taught by Professor Corcoran during the Spring '11 term at GWU.

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