Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Suicidal Black Holes

  1. Apr 30, 2003 #1
    Ok, so I was thinking, if charge is conserved in the singularity of a black hole, you could have a black hole with a net charge one way or another. And then you could treat the black hole as a charged particle and in a binary system it could actually produce an em-wave. Then thinking further if a net charge did exsist the EM is strong enough to attract the opposite charge and the black hole could not maintain a net charge for a long period. But if it was in an area isolated enough to have a charge for some extended period of time, then would it become suicidal, that is would Hawking radiation kill it more quickly to even out the charge, in turn making it less massive, and in turn making it more likely to radiate. Just some thoughts.
  2. jcsd
  3. Apr 30, 2003 #2
    Correct me if I'm wrong, but if it produced EM radiation, wouldn't that radiation just be sucked back into the black hole?
  4. Apr 30, 2003 #3
    Hawking radiation isn't EM radiation, its particle loss. A virtual particle becomes a real particle, and escapes the black hole with its mass.
  5. Apr 30, 2003 #4


    User Avatar
    Science Advisor

    Greetings !

    Well, I'm not certain about the EM part, but your
    idea is intresting. I suppose that with a
    sufficiently large charge to mass ratio the
    Hawking radiation could be a considrable effect
    for a while. I wonder if there will be some
    effects on the EM field from the BH.

    Live long and prosper.
  6. Apr 30, 2003 #5
    I know about Hawking radiation, and how that all works, but you said:
    Wouldn't the EM radiation that it emits just be reabsorbed? Then the energy loss would be lessened. Also, would a charged black hole necessarilly emit more Hawking Radiation? If I'm not mistaken, that's a random event that has no relation to the outside environment.
  7. May 1, 2003 #6
    Mark726, I don't believe the EM wave ever exits the black hole.
  8. May 1, 2003 #7


    User Avatar
    Science Advisor

    Greetings !

    I think there will be more Hawking Radiation
    because the electric field will be able to
    pull some virtual particles from the zero
    point fluctuations just like the gravitational
    field does.

    Again, I'm not certain about EM waves but I think
    they should be created. If a BH has an electric
    charge then in a relativly accelerating reference
    frame it has to produce EM waves, just like
    the normal electric and magnetic fields in
    a stationary and in a constant relative velocity
    frames respectivly. Otherwise, it'll be violating
    a whole bunch of laws and besides the EM waves
    are not created "inside" particles so they
    shouldn't be created inside a BH either -
    the inside potential should be the same and the
    charge should distribute itself along the surface -
    just like a simple conducting sphere, I think. :wink:

    Live long and prosper.
  9. May 1, 2003 #8
    All I know is that there is a possibility that if you overcharge a black hole, two of its horizons end up canceling each other out in some burst of energy and leaving behind a naked singularity (traversible wormhole?)
  10. May 1, 2003 #9
    No, energy isn't being released when you treat it like a charged particle. Its like if you take any charged particle, and shake it up and down, a distant observer sees an induced em field, or light wave
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Suicidal Black Holes
  1. Black Holes (Replies: 2)

  2. Black holes (Replies: 5)

  3. Black hole (Replies: 6)

  4. Black holes (Replies: 16)