From: helbig@asclothestro.multivax.de   
      
   In article <5e356d1b$0$10259$e4fe514c@news.xs4all.nl>, Jos Bergervoet   
    writes:   
      
   > After the merger of two black holes there is a "ringdown" in which the   
   > new black hole radiates off some energy.   
   >   
   > Presumably this ringdown amplitude decays exponentially, so it never   
   > becomes exactly zero. We can also easily imagine (although not easily   
   > test experimentally) the reverse: some incoming gravitational radiation   
   > which is nicely focussed on an existing balck hole makes it "ring up"   
   > instead of ring down..   
   >   
   > But if a black hole can have vibration amplitudes, for lots of spherical   
   > harmonics as it seems, doesn't that violate the no-hair theorem?   
      
   No, because the no-hair conjecture (it hasn't actually been proved)   
   applies to static black holes.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)