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

Would a black hole be able to suck-in another blackhole?

  1. Jul 29, 2005 #1
    Hi there. I just have a question about blackholes.

    Would a black hole be able to suck-in another blackhole???
     
  2. jcsd
  3. Jul 29, 2005 #2
    as a star that went super nova is the starting point of a black hole and there is a limit to the size of a star and so a limit to the size of the resulting black hole BUT we have super masive black hole as galitic center objects
    therefor it is very likely that they do combine but there is no sucking to the deal just normal gravity at work

    btw I think this process results in a quazar while the two [or more ] black holes are
    moveing at high speeds thru each others disks of matter that they each have around them
    as I cannot see simple infalling matter supplying the required energy
     
  4. Jul 29, 2005 #3
    is there a limit of how much matter it can suck in?
     
  5. Jul 29, 2005 #4

    no limits but [well a bigger BH would not infall to a smaller one]
    they do NOT suck
    they have mass that has the very same gravity as any other lump that has the same mass

    and mostlikely something other then the simple infall of stuff is seen in the
    growth to super massive size as exists in the central galixcys black holes we see today
     
  6. Aug 2, 2005 #5

    Phobos

    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    Yes, 2 (or more) black holes can combine into 1 larger black hole. IIRC, the new black hole has slightly less mass than the sum of the 2 black holes that formed it due to energy loss through gravitational waves.

    No known upper mass limit for a black hole.
     
  7. Aug 2, 2005 #6

    Danger

    User Avatar
    Gold Member

    Unless I missed something somewhere along the line, I believe that the total mass of the universe would be the defining limit. That's essentially the thinking behind the 'Big Crunch' proposal, isn't it? If the limit were lower, such a thing would never have been suggested in the first place.
     
  8. Aug 2, 2005 #7
    I thought from reading posts here that
    there is a gain in total mass
    from relitiveistic effects of the high speeds reached
    as the two BH sprial in to each other at near light speeds
     
  9. Aug 2, 2005 #8

    Labguy

    User Avatar
    Science Advisor

    No, Phobos is correct.
     
  10. Aug 3, 2005 #9

    Phobos

    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    Ok, the total available mass in the universe is an upper limit. :smile:
    But a black hole is an object set within spacetime whereas a Big Crunch would consume all of spacetime as well.
     
  11. Aug 4, 2005 #10

    Danger

    User Avatar
    Gold Member

    Good point... but it would still be a swell name for a candy bar. :biggrin:
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Would a black hole be able to suck-in another blackhole?
  1. Black Holes Suck (Replies: 8)

Loading...