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16_-_Neutron_Stars

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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5 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?
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