The Two-Component Virial Theorem and the Physical Properties of Stellar Systems
arXiv:astro-ph/9910541 · doi:10.1086/312415
Abstract
Motivated by present indirect evidences that galaxies are surrounded by dark matter halos, we investigate whether their physical properties can be described by a formulation of the virial theorem which explicitly takes into account the gravitational potential term representing the interaction of the dark halo with the barionic or luminous component. Our analysis shows that the application of such a ``two-component virial theorem'' not only accounts for the scaling relations displayed, in particular, by elliptical galaxies, but also for the observed properties of all virialized stellar systems, ranging from globular clusters to galaxy clusters.
arXiv comment13 pages, 2 figures, LaTeX, corrected few typos. This version matches the published version
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- From Galaxy Clusters to Ultra-Faint Dwarf Spheroidals: A Fundamental Curve Connecting Dispersion-supported Galaxies to Their Dark Matter Halos
- "Fundamental-Plane"-Like Relations From Collisionless Stellar Dynamics: A Comparison of Mergers and Collapses
- Toward Understanding the origin of the Fundamental Plane for Early-Type Galaxies
- Dissipationless Collapse of Spherical Protogalaxies and the Fundamental Plane
- Fundamental plane: dark matter and dissipation contributions
- Gravitational Mesoscopic Constraints in Cosmological Dark Matter Halos
- The two-component virial theorem and the acceleration-discrepancy relation