Atribución-NoComercial 4.0 InternacionalNowakowski, MarekSanabria, Juan CarlosGarcía, Alejandro2019-07-032019-07-032001https://repositorio.unal.edu.co/handle/unal/70649Starting from the Newtonian limit of Einstein's equations in the presence of a positive cosmological constant, we obtain a new version of the virial theorem and a condition for gravitational equilibrium. Such a condition takes the form ρ and gt; λρvac, where ρ is the mean density of an astrophysical system (e.g. galaxy, galaxy cluster or supercluster), λ is a quantity which depends only on the shape of the system, and ρvac is the vacuum density. We conclude that gravitational stability might be infiuenced by the presence of Λ depending strongly on the shape of the system.application/pdfspaDerechos reservados - Universidad Nacional de Colombiahttp://creativecommons.org/licenses/by-nc/4.0/Artículo de revistahttp://bdigital.unal.edu.co/35119/info:eu-repo/semantics/openAccessConstante cosmológicadensidadgalaxias