Fundamental plane: dark matter and dissipation contributions

Context. Stellar and galactic systems are objects in dynamical equilibrium that are composed of ordinary baryonic matter hypothetically embedded in extended dominant dark matter halos. Aims. Our aim is to investigate the scaling relations and dissipational features of these objects over a wide range...

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Bibliographic Details
Published in:Astronomy and astrophysics (Berlin) 2010-10, Vol.521, p.A58
Main Authors: Ribeiro, A. L. B., Dantas, C. C.
Format: Article
Language:English
Subjects:
Astronomy
Dark matter
Dissipation
Dynamical systems
Dynamics
Earth, ocean, space
Exact sciences and technology
galaxies: fundamental parameters
galaxies: halos
galaxies: structure
Halos
Physical properties
Virial theorem
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Summary:Context. Stellar and galactic systems are objects in dynamical equilibrium that are composed of ordinary baryonic matter hypothetically embedded in extended dominant dark matter halos. Aims. Our aim is to investigate the scaling relations and dissipational features of these objects over a wide range of their properties, taking the dynamical influence of the dark matter component into account. Methods. We study the physical properties of these self-gravitating systems using the two-component virial theorem in conjunction with data that embrace a wide range of astrophysical systems. Results. We find that the scaling relations defined by the properties of these objects admit a dark-to-luminous density ratio parameter as a natural requirement in this framework. We also probe dissipational effects on the fundamental surface defined by the two-component virial theorem and discuss their relations with respect to the region devoid of objects in the data distribution. Conclusions. Our results indicate complementary contributions of dissipation and dark matter to the origin of scaling relations in astrophysical systems.
ISSN:0004-6361
1432-0746
DOI:10.1051/0004-6361/200913989