Spherical collapse with dark energy

Details Spherical collapse with dark energy Spherical collapse with dark energy

2006-02-20

arxiv.org/abs/astro-ph/0602441v1

Int.J.Theor.Phys.46:2274-2282,2007

Astronomy and Astrophysics

Astrophysics

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

Scientific paper

10.1007/s10773-007-9344-z

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.

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