Phantom damping of matter perturbations

被引：96

作者：

Amendola, L

Tsujikawa, S ^{[1
]}

Sami, M

机构：

[1] Gunma Natl Coll Technol, Dept Phys, Gunma 3718530, Japan

[2] Osserv Astron Roma, INAF, I-00040 Monte Porzio Catone, Roma, Italy

[3] IUCAA, Pune 411007, Maharashtra, India

来源：

PHYSICS LETTERS B | 2006年 / 632卷 / 2-3期

基金：

日本学术振兴会;

关键词：

D O I：

10.1016/j.physletb.2005.10.065

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：155 / 158

页数：4

共 31 条

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