Scalar graviton as dark matter
  In the report, the theory of unimodular bimode gravity built on principles of
unimodular gauge invariance/relativity and general covariance is exposed.
Besides the massless tensor graviton of General Relativity, the theory includes
an (almost) massless scalar graviton treated as the gravitational dark matter.
A spherically symmetric vacuum solution, describing the coherent
scalar-graviton field for the soft-core dark halos with the asymptotically flat
rotation curves, is demonstrated.
