Notices
Results 1 to 4 of 4
Like Tree2Likes
  • 2 Post By Strange

Thread: Cosmic pong

  1. #1 Cosmic pong 
    Suspended
    Join Date
    Jul 2012
    Posts
    613
    Well, I am sure this has been asked before, but I cannot find any good repository with picture/animation of simulation of colliding black hole. I can remember some about orbiting black hole but I am wondering about some other scenarios.
    Let's say two black hole are on a colliding course at relativistic speed (let's say > 200 K*km/s).
    1: at the closest only they even horizon intersect (even very slightly . Do they became forcibly bounded for ever even if none of the 'matter' part inside the even horizon actually enter the other's even horizon ? In other words, can events horizon escape even horizon ?
    2: now the two black holes came dead on into each others. I suppose you can still consider those to have a great deal of kinetic energy. I am wondering how this tremendous amount of energy is supposed to be released. Are the gravitational wave supposed to export the energy of that impact ? I am under the impression that those wave also travel at light speed, so should not be able to escape the big flop ...
    3: At speed much more 'reasonable', 3 black holes(or more) meet in convergent trajectories on a same plane (I know the odds thank you . Is it possible for those to form a orbiting triplet (are there known stars in such formation BTW ?). Eventually merging into a black ring ? Or maybe the maths forbid that ?
    4: Now a smaller black hole arrive for the final dunk into that cosmic basket ... now space around that event should be weird, isn't it ?


    Reply With Quote  
     

  2.  
     

  3. #2  
    Brassica oleracea Strange's Avatar
    Join Date
    Oct 2011
    Location
    喫茶店
    Posts
    16,825
    As they spiral in towards each other they will radiate gravitational waves. They will oscillate for a short time after they merge, radiating gravitational waves.
    Inspiral-Merger-Ringdown

    When they approach, the event horizons will distort and reach out towards each other. At this point I believe it is "too late" and nothing can stop the merger even if the event horizons haven't touched yet.

    A few animations here:
    What Happens When Supermassive Black Holes Merge?
    4. Black Hole Collisions
    Merging of the black holes - Theory
    black-holes.org—Movies of Extreme Spacetimes


    ei incumbit probatio qui dicit, non qui negat
    Reply With Quote  
     

  4. #3  
    Brassica oleracea Strange's Avatar
    Join Date
    Oct 2011
    Location
    喫茶店
    Posts
    16,825
    Quote Originally Posted by Boing3000 View Post
    3: At speed much more 'reasonable', 3 black holes(or more) meet in convergent trajectories on a same plane (I know the odds thank you . Is it possible for those to form a orbiting triplet (are there known stars in such formation BTW ?). Eventually merging into a black ring ? Or maybe the maths forbid that ?
    Suprisingly, that might be possible. From the Wikipedia page:
    Simulations as of 2011 had not produced any event horizons with toroidal topology, although others suggested that it would be possible, for example if several black-holes orbiting in the same circle coalesce.
    Binary black hole - Wikipedia, the free encyclopedia
    [1110.1668v1] On Toroidal Horizons in Binary Black Hole Inspirals
    Markus Hanke and Boing3000 like this.
    ei incumbit probatio qui dicit, non qui negat
    Reply With Quote  
     

  5. #4  
    Suspended
    Join Date
    Jul 2012
    Posts
    613
    Thank you very much Strange, here is a plentiful of links to dig in !

    Any idea about the case two, where the 'solid' part of the black hole (kind of neutron start?) actually colide ? Or is there so much space and time inside the hole that they won't actually reach each other before eternity ?

    I am still wondering how conservation of energy/momentum/spin will proceed in such case. Well maybe in some of the articles. Back to reading !
    Reply With Quote  
     

Similar Threads

  1. a Cosmic Odyssey
    By MrBibbles in forum General Discussion
    Replies: 0
    Last Post: March 24th, 2012, 11:02 PM
  2. Cosmic Expension
    By yapkf in forum Astronomy & Cosmology
    Replies: 8
    Last Post: September 25th, 2010, 01:27 PM
  3. Cosmic Formation
    By dalemiller in forum Personal Theories & Alternative Ideas
    Replies: 0
    Last Post: December 26th, 2009, 05:04 PM
  4. How do PIN PONG BALLS????
    By kmilaaa in forum General Discussion
    Replies: 0
    Last Post: October 8th, 2008, 08:49 PM
Bookmarks
Bookmarks
Posting Permissions
  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •