🚀 go-pugleaf

matt@physics2.berkeley.edu (Matt Austern) writes:

>The problem is that there is evidence for dark matter on all distance
>scales, but when you look on longer distance scales, the amount of
>dark matter appears to be greater.  (I find it fascinating, actually,
>that this effect seems to be monatonic.)

Besides my remark on the similarity to cosmological constant, I want to 
state that such an effect could perhaps be modelled by a finite range
model for gravity, i.e. something like "massive" gravitons. BTW, the
cosmological constant appears in the linearized Einstein field eq 

        ,lambda
  h                + Lambda ( eta      + h     ) =
   mu nu   ,lambda               mu nu    mu nu

        = 8 pi G ( T      - T eta     )
                    mu nu        mu nu

also as a mass-like term for h_{mu nu} or g_{mu nu} (g=eta+h, of course).
--
 Hartmut Frommert                 <phfrom@nyx.uni-konstanz.de>
 Dept of Physics, Univ of Constance, P.O.Box 55 60, D-W-7750 Konstanz, Germany
                                           -- Eat whale killers, not whales --