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Unformatted text preview: The Corpses of Massive Stars white dwarfs o degenerate electrons in a white dwarf are moving very fast, but the laws of quantum mechanics preven them from losing energy all of the lower levels are filled o atomic nuclei ( positive ions) are not degenerate o white dwarfs are retired stars spend their life savings Life process of the Sun o after about 10 billion years it will leave the main sequence and become a Red Giant enters planetary nebula stage Different outer layers burn off o Surface cools down, but its surface area stays the same luminosity plummets because its temperature drops Mass limit of a white dwarf = 1.4 the mass of the Sun Single stars evolve in a simple manner- lifetime of the main sequence depends mostly on MASS Binary stars o mass exchange Roche lobe o More massive star will turn into a Red Giant first mass spirals into the other, smaller star recipient star can gain a lot of mass: evolves faster than it would...
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This note was uploaded on 04/04/2008 for the course ASTRO C 10 taught by Professor Filippenko during the Fall '08 term at University of California, Berkeley.
- Fall '08