Volume 413, Number 3, January III 2004
|Page(s)||799 - 805|
|Section||Cosmology (including clusters of galaxies)|
|Published online||07 January 2004|
Scalar fields properties for flat galactic rotation curves
Laboratoire Univers et Théories, CNRS-FRE 2462, Observatoire de Paris, 92195 Meudon Cedex, France
Corresponding author: Steph.Fay@Wanadoo.fr
Accepted: 25 September 2003
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.
Key words: galaxies: kinematics and dynamics / cosmology: dark matter / cosmology: theory
© ESO, 2004
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