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Time of a hypernova

  1. Mar 12, 2014 #1

    bobie

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    How long can the explosion of a super/hyper nova last?,
    does time depend on mass?
    is it possible that an explosion lasts for years?

    Thanks
     
  2. jcsd
  3. Mar 12, 2014 #2

    phyzguy

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    How do you define the end of the explosion? The supernova ejects material into mostly empty space and this material continues expanding for a very long time. For example, this image is of a supernova that exploded in 1006 AD. It is still expanding. So do you consider this explosion to be still occurring? Or is the explosion "over"?
     
  4. Mar 12, 2014 #3

    bobie

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    If I can make a comparison with a volcano, when matter stops being thrown out.
    My question is if the esplosion is lake a blast of dynamite, or like a volcano , which can erupt for weeks. Can the star eject material for centuries? does time depend on size, power, speed etc.?
     
  5. Mar 12, 2014 #4

    phyzguy

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    I see. In that respect, it is more like a blast of dynamite. Most of the energy is deposited in a fraction of a second, and the explosion just evolves from there. The main qualification of this is that many of the heavy nuclei that are ejected are unstable, and they decay over a period of months to years and deposit their energy of decay in the expanding shell.
     
  6. Mar 13, 2014 #5

    bobie

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    Thanks a lot
     
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