Term
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Definition
| White dwarf is the corpse of a low-mass star, supported against the crush of gravity by electron degeneracy pressure |
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Term
| what is the mass and size of a white dwarf? |
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Definition
| Mass of the sun, size of the earth |
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Term
| Mass Limit of a white dwarf? |
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Definition
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Term
| What happens to a white dwarf in a binary system? |
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Definition
| gas from a companion star can spill toward a white dwarf, forming a swirling accretion disk around it. |
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Term
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Definition
| hydrogen fusion on the surface of a white dwarf in a binary star system |
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Term
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Definition
| "carbon bomb" carbon fusion begins and ignites to explode a white dwarf |
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Term
| What happens when a white dwarf exceeds its limit mass? |
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Definition
| it will explode completely in a white dwarf supernova |
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Term
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Definition
| the ball of neutrons created by the collapse of the iron core in a massive star supernova. |
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Term
| neutron star, mass, size, temp, density, rotation? |
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Definition
Mass- 1Msun
Size- few kilometers in radius
temp-
density-extrememly dense
rotation- velocity about half the speed of light |
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Term
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Definition
| Jocelyn Bell discovered a strange source of radio waves that pulsed at precise intervals |
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Term
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Definition
| neutron wars left behind by the supernova explosions |
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Term
| what happens to a neutron star in a binary system? |
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Definition
| the hot accretion disks around neutron stars in close binary stems shine brightly with x rays. |
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Term
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Definition
| helium fuses rapidly to make carbon and heavier elements, generating a burst of energy that flows from the neutron star in the form of x rays. |
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Term
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Definition
| a place where gravity is so strong that nothing, not even light, can escape from within it. |
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Term
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Definition
| impossible to visit because it has an escape velocity greater than the speed of light. |
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Term
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Definition
| boundary between the inside of the black hole and the universe outside |
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