AST201_winter2010_mreid_slideset7_v2_Bb

AST201_winter2010_mreid_slideset7_v2_Bb - 2/5/2010 AST 201...

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2/5/2010 1 AST 201 Stars and Galaxies 1 AST 201, Winter 2010, University of Toronto, Dr. M. A. Reid Stellar Corpses AST 201, Winter 2010, University of Toronto, Dr. M. A. Reid 2 We have already said that, when a low-mass star like the Sun dies, it will become a white dwarf. AST 201, Winter 2010, University of Toronto, Dr. M. A. Reid 3 When a massive star goes supernova, one of three things can happen. AST 201, Winter 2010, University of Toronto, Dr. M. A. Reid 4
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2/5/2010 2 First, the star could just blow itself completely apart, leaving nothing. We are not totally sure if that actually happens. AST 201, Winter 2010, University of Toronto, Dr. M. A. Reid 5 Second, it can blow away everything but that core of neutrons created during the neutronization phase. AST 201, Winter 2010, University of Toronto, Dr. M. A. Reid 6 AST 201, Winter 2010, University of Toronto, Dr. M. A. Reid 7 This leaves a giant ball of neutrons about the size of Manhattan (~10 km) in space, called a neutron star. AST 201, Winter 2010, University of Toronto, Dr. M. A. Reid 8 A teaspoon of neutron star matter would have the same mass as about 25,000 CN Towers =
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2/5/2010 3 AST 201, Winter 2010, University of Toronto, Dr. M. A. Reid 9 Like Earth, neutron stars have powerful magnetic fields which channel particles from space toward their magnetic poles, where they smash into the surface. This causes the star to glow at two spots. Due to conservation of
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This note was uploaded on 03/02/2010 for the course AST AST201 taught by Professor Mochnacki during the Spring '10 term at University of Toronto- Toronto.

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AST201_winter2010_mreid_slideset7_v2_Bb - 2/5/2010 AST 201...

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