16_-_Neutron_Stars - 16 Neutron Stars The Plan What happens...

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16 – Neutron Stars Tommy Gold (Cornell) 2 The Plan • What happens in an aging star that is more massive than the Chandrasekhar Limit? Ans. Neutrons come to the rescue! • Why are neutrons better than electrons? Ans. They aren’t, just more massive. • Eventually there is a limit to the mass of a neutron star, but there is nobody named after this mass! (Tommy was just too argumentative.) 3 AM Her But first a common theme. 4 Cataclysmic Variables
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Cutaway View of a Neutron Star 6 The Neutron Onion 10 15 g/cm 3 or 10 8 Volvo’s/sugar cube 7 Pulsar Discovery, Spinning Neutron Star • In 1967, graduate student Jocelyn Bell and her advisor Anthony Hewish accidentally discovered a radio source in Vulpecula . • It was a sharp pulse which recurred every 1.3 sec. • They called it a pulsar , but what was it? Jocelyn Bell Light Curve of Jocelyn Bell’s Pulsar 8 Gold’s speed-of-light cylinder What must happen when the charges Reach the speed-of-light cylinder? The particles must be released at the LC.
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This note was uploaded on 04/05/2009 for the course ASTRO 3332 taught by Professor Houck,j during the Spring '09 term at Cornell University (Engineering School).

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16_-_Neutron_Stars - 16 Neutron Stars The Plan What happens...

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