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12 Cards in this Set
- Front
- Back
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What is hydrostatic equilibrium? How does the star "regulate" itself with nuclear reactions?
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out and in pressure are equal, reaction rate
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Mass is most important characteristic for predicting a stars life and evolution. Why?
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Mass-luminousity
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What happens to Sun-like stars when they run out of fuel? What will they first become?
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core shrinks, increase in heat, red giant phase, helium fusion
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. Where do sun-like stars move on the HR diagram? Why? What's happening in the core?
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up and right
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What are the final stages of a solar mass star? What's a white dwarf? Where did it come from?
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expand outer shell, forming planetary nebula, white dwarf cools
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What about high mass stars? Why can't they end as Planetary Nebula/White Dwarfs?
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thermal energy, supernova, 8
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How do the cores of massive stars evolve? What do they become after leaving the M.S.?
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enriched with ash/ fuel, super red giant phase
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What is SN1987A? Why was it so important? What had it been before it blew up?
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first supernova of 1987, closest supernova since 1604, BBI
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White Dwarf: Size? Density? What is their eventual fate? Are they evolving? How?
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earth size, cool and fade from HR diagram, no evolution.
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What holds White Dwarfs 'up' against their gravity? What is the Chandrasakhar Limit?
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electron degereacy fails at 1.4 solar mass, IA Supernova to neutron star
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Neutron Stars: Size? Density? What holds them up? How are they created?
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20KM, 100 trillion, neutron degenerency
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. How do we observe Neutron Stars? How was the first Neutron Star detected?
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Pulsar neutron stars are only observed once, binary star systems x-ray radiation. 1967 in the form of radio pulsars
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