PHYS 183 Chapter Notes - Chapter 14: Redshift, Accretion Disk, Lagrangian Point
15 Mar 2017
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14. 1, 14. 2 and 14. 3 (lectures 22 and 23: stars more than 20 solar masses (high-mass) form black holes. 8-20 solar masses (intermediate mass) form neutron stars. There is a limit of 2 particles on each energy level (with different spins. : electron degeneracy pressure supports white dwarfs from further collapse. So it continuously cools forever without getting smaller. These white dwarfs are extremely dense and very faint. Poll question: what is the density of a 1 solar mass wd with a 1 earth radius. If the mass of the white dwarf is too large, electron degeneracy pressure fails. The maximum white dwarf mass is 1. 4 solar masses, aka the chandrasekhar limit. Above the limit the star collapses: neutron stars are supported by neutron degeneracy pressure, with neutrons instead of electrons. They have small radii but the highest known density in the universe except for black holes. The former core of the star collapses completely.
