Contributions from Dilatonic Strings to the Flat Behaviour of the   Rotational Curves in Galaxies
  We analyse the flat behaviour of the rotational curves in some galaxies in the framework of a dilatonic, current-carrying string. We determine the expression of the tangential velocity of test objects following a stable circular equatorial orbit in this spacetime. 
M. Leineker Costa (IF/UnB), A. L. Naves de Oliveira (DF/UEL) and M. E.   X. Guimaraes (MAT/UnB)