Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-11-07
Phys.Rev. D69 (2004) 103524
Astronomy and Astrophysics
Astrophysics
12 pages, submitted to Phys. Rev; v2: added a ref. and corrected a typo
Scientific paper
10.1103/PhysRevD.69.103524
I review the linear and second-order perturbation theory in dark energy models with explicit interaction to matter in view of applications to N-body simulations and non-linear phenomena. Several new or generalized results are obtained: the general equations for the linear perturbation growth; an analytical expression for the bias induced by a species-dependent interaction; the Yukawa correction to the gravitational potential due to dark energy interaction; the second-order perturbation equations in coupled dark energy and their Newtonian limit. I also show that a density-dependent effective dark energy mass arises if the dark energy coupling is varying.
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