2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/118507We consider the singular configurations of gravitating gas [1] which could be used as a model for disk galaxies. The simplest steady configuration, which corresponds to rotation of stars around center gives flat rotational curve, provided the density distrubution has a tail, decaying as 1/r. This result based exclusively on Newtonian gravity and does not involve dark matter.10 pagesAstrophysicsHigh Energy Physics - Theorytext