Phantom damping of matter perturbations

Amendola, Luca ; Tsujikawa, Shinji ; Sami, M. (2006) Phantom damping of matter perturbations Physics Letters B, 632 (2-3). pp. 155-158. ISSN 0370-2693

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Official URL: http://www.sciencedirect.com/science/article/pii/S...

Related URL: http://dx.doi.org/10.1016/j.physletb.2005.10.065

Abstract

Cosmological scaling solutions are particularly important in solving the coincidence problem of dark energy. We derive the equations of sub-Hubble linear matter perturbations for a general scalar-field Lagrangian-including quintessence, tachyon, dilatonic ghost condensate and k-essence-and solve them analytically for scaling solutions. We find that matter perturbations are always damped if a phantom field is coupled to dark matter and identify the cases in which the gravitational potential is constant. This provides an interesting possibility to place stringent observational constraints on scaling dark energy models.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
ID Code:70517
Deposited On:19 Nov 2011 11:34
Last Modified:19 Nov 2011 11:34

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