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Clustering properties of dynamical dark energy models

Title
Clustering properties of dynamical dark energy models
Type
Article in International Scientific Journal
Year
2008
Authors
Avelino, PP
(Author)
FCUP
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Beca, LMG
(Author)
Other
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Martins, CJAP
(Author)
FCUP
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Other information
Authenticus ID: P-003-ZX4
Abstract (EN): We provide a generic but physically clear discussion of the clustering properties of dark energy models. We explicitly show that in quintessence-type models the dark energy fluctuations, on scales smaller than the Hubble radius, are of the order of the perturbations to the Newtonian gravitational potential, hence necessarily small on cosmological scales. Moreover, comparable fluctuations are associated with different gauge choices. We also demonstrate that the often used homogeneous approximation is unrealistic, and that the so-called dark energy mutation is a trivial artifact of an effective, single fluid description. Finally, we discuss the particular case where the dark energy fluid is nonminimally coupled to dark matter.
Language: English
Type (Professor's evaluation): Scientific
No. of pages: 5
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