2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/57858We study the Nordström-Vlasov system which describes the dynamics of a self-gravitating ensemble of collisionless particles in the framework of the Nordström scalar theory of gravitation. If the speed of light $c$ is considered as a parameter, it is known that in the Newtonian limit $c\to\infty$ the Vlasov-Poisson system is obtained. In this paper we determine a higher approximation and establish a pointwise error estimate of order $O(c^{-4})$. Such an approximation is usually called a 1.5 post-Newtonian approximation.26 pages. See also http://www.uni-essen.de/ingmath/people/bauer/Mathematical Physicstext