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Type: Artigo de periódico
Title: The two-component virial theorem and the physical properties of stellar systems
Author: Dantas, CC
Ribeiro, ALB
Capelato, HV
de Carvalho, RR
Abstract: Motivated by present indirect evidence that galaxies are surrounded by dark matter halos, we investigate whether their physical properties can be described by a formulation of the virial theorem that explicitly takes into account the gravitational potential term representing the interaction of the dark halo with the baryonic or luminous component. Our analysis shows that the application of such a "two-component virial theorem" not only accounts for the scaling relations displayed by, in particular, elliptical galaxies, but also for the observed properties of all virialized stellar systems, ranging from globular clusters to galaxy clusters.
Subject: cosmology : theory
dark matter
galaxies : elliptical and lenticular, cD
galaxies : fundamental parameters
galaxies : halos
galaxies : kinematics and dynamics galaxies : structure
Country: EUA
Editor: Univ Chicago Press
Rights: aberto
Identifier DOI: 10.1086/312415
Date Issue: 2000
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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