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lecture9 - Supernovae ==> neutron stars ==> pulsars...

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Unformatted text preview: Supernovae ==> neutron stars ==> pulsars stellar mass black holes ==> Gamma Ray Bursters added attraction -- Galactic center black hole High Mass Star death : Crab Nebula -- SN 1054AD, 30 ms pulsar and pulsar wind X-ray Visible light pulsar visible light 30ms framing Evolution of the expanding SN shell an important source of KE to interstellar gases initally moving outwards at 10 4 km/s slows down as it encounters interstellar gas eventually ring breaks up Cas A SN Veil Nebula Cygnus SN Vela SN Binary pulsar 1974-- Russell Hulse and Joe Taylor discovered a pulsar in a close binary system. Pulse arrival times ==> eccentric orbit (e = 0.62) period of 7.8 hours. change in orbit consistent w/ GR prediction of gravity waves ==> Nobel prize Observed change in time of closest approach matches the General Relativity prediction Orbit shrinks by ~3 mm per orbit of the binary system. Binary pulsar orbit rotation Neutron star structure Extreme magnetic felds -- Earth B-feld: ~0.6 Gaus , typical magnet: ~100 Gauss Neutron Stars: ~10 9 to 10 15 Gauss !!...
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This note was uploaded on 09/25/2010 for the course AY 106 taught by Professor Schrerr during the Winter '09 term at UMBC.

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lecture9 - Supernovae ==> neutron stars ==> pulsars...

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