From: helbig@asclothestro.multivax.de   
      
   In article ,   
   helbig@asclothestro.multivax.de (Phillip Helbig (undress to reply))   
   writes:   
      
   > In article , Keith Stein   
   >  writes:   
   >   
   > > I suspect there could be a simple relationship of the form:   
   >   
   > On what grounds, other than just trying to fit the data?   
   >   
   > >      ( constant orbital speed )^2 = K * mass of galaxy   
      
   > > Which gives:                   v^2     = K * M   
   > >   
   > > Note v is independent of R, so this would nicely explain the   
   > > flat orbital velocity curves of spiral galaxies.   
   >   
   > The empirical relationship, though, is v^4 = K * M, where K=GMa_0 and   
   > a_0 is the empircally determined MOND acceleration.   
      
   Sorry, that should be K = G*a_0, since we already have M.  (For a given   
   galaxy, G*M*a_0 is of course constant, which is what I was thinking of.)   
      
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