Chopovsky, Oleksii V.2014-03-292014-03-292013Odessa Astronomical Publicationshttps://dspace.onu.edu.ua/handle/123456789/4789Odessa Astronomical publications / Одесская астроном. обсерватория . – Одесса : Астропринт, 2013 . – Vol.26/2We consider the dynamics of a two-body system in the model with additional spatial dimensions compactified on a Ricci-flat manifold. To define the gravitational field of a system and to construct its Lagrange function we use the weak-field approach. It is shown, that to avoid the contradiction with the experimental restrictions on the value of PPN-parameter γ, the massive sources must have nonzero pressure/tension into the extra dimensions and also must be uniformly smeared there. This fact leads directly to the absence of the Kaluza-Klein modes, which looks unnatural from the point of quantum mechanics.enKaluza-Klein modelstwo-body problemArticle