A&A 413, 799-805 (2004)
Scalar fields properties for flat galactic rotation curvesS. Fay
Laboratoire Univers et Théories, CNRS-FRE 2462,
Observatoire de Paris, 92195 Meudon Cedex, France
(Received 21 May 2003 / Accepted 25 September 2003)
Abstract Key words:
The whole class of minimally coupled and massive scalar fields which may be responsible for flattening of galactic rotation
curves is found. An interesting relation with a class of scalar-tensor theories able to isotropise anisotropic models of Universe
is shown. The resulting metric is found and its stability and scalar field properties are tested with respect to the presence
of a second scalar field or a small perturbation of the rotation velocity at galactic outer radii.
galaxies: kinematics and dynamics --
cosmology: dark matter --
© ESO 2004
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