Spherical collapse with dark energy

Abstract

I discuss the work of Maor and Lahav [1], in which the inclusion of dark energy into the spherical collapse formalism is reviewed. Adopting a phenomenological approach, I consider the consequences of - a) allowing the dark energy to cluster, and, b) including the dark energy in the virialization process. Both of these issues affect the final state of the system in a fundamental way. The results suggest a potentially differentiating signature between a true cosmological constant and a dynamic form of dark energy. This signature is unique in the sense that it does not depend on a measurement of the value of the equation of state of dark energy.

To appear in the proceedings of the ``Peyresq Physics 10" Workshop, 19 - 24 June 2005, Peyresq, France

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Cited by in corpus (8)

• Phantom stars and topology change
• On the implementation of the spherical collapse model for dark energy models
• Probing Dark Energy at Galactic and Cluster Scales
• Relativistic virialization in the Spherical Collapse model for Einstein-de Sitter and ΛCDM cosmologies
• The role of shell crossing on the existence and stability of trapped matter shells in spherical inhomogeneous Λ-CDM models
• Evolution of Spherical Overdensity in Thawing Dark energy Models
• Non-linear density-velocity divergence relation from phase space dynamics
• Cosmic Acceleration from Causal Backreaction in a Smoothly Inhomogeneous Universe