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Unformatted text preview: speed of light Quantum Mechanics:
The more electrons are conﬁned, the
faster they must move Both of these are required to
understand white dwarfs! The Chandrasekhar Limit
Quantum Mechanics requires
electrons to move faster the
more they are squeezed
As a white dwarf’s mass
approaches 1.4 Msun, this
requires electrons to move
faster than the speed of
light! Not allowed!!!! So no white dwarf more
massive than 1.4 Msun White dwarfs are so massive (yet small)
they can tear other stars apart! For example: Accretion in binary systems Dwarf steals hydrogen Companion becomes
white dwarf Nova occurs (explosion!) White dwarf explosions
give us Type Ia
Supernovae Which allows us
to determine that
the universe is
accelerating! Two types of Supernovae 1. Exploding massive (heavy) stars
2. Exploding white dwarfs that ate their
neighbor (Type Ia)
White dwarf doesn’t explode all the way?
Thats called a Nova
(10 million times less luminous)...
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This note was uploaded on 03/05/2014 for the course AST 104 taught by Professor Dontremember during the Spring '08 term at Syracuse.
- Spring '08