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Paper   IPM / P / 8979
School of Physics
  Title:   Phenomenological Covariant Aapproach to Gravity
  Author(s):  Q. Exirifard
  Status:   Preprint
  Journal:
  Year:  2008
  Supported by:  IPM
  Abstract:
We examine if a generally covariant modification of the dynamics of the empty space-time is capable of describing the flat rotational velocity curves of the spiral galaxies. In so doing, we show f([(|Rabcd|4)/(|Rabcd;e|2)]) is the simplest correction to the Einstein-Hilbert Lagrangian capable of describing the flat rotational velocity curves of the spiral galaxies. We also show that such a description alters the space-time geometry around the Sun only beyond 1031 AU from the Sun.

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