Effects of dark sectors' mutual interaction on the growth of structures
arXiv:0902.0660 · doi:10.1088/1475-7516/2009/07/030
Abstract
We present a general formalism to study the growth of dark matter perturbations when dark energy perturbations and interactions between dark sectors are present. We show that dynamical stability of the growth of structure depends on the type of coupling between dark sectors. By taking the appropriate coupling to ensure the stable growth of structure, we observe that the effect of the dark sectors' interaction overwhelms that of dark energy perturbation on the growth function of dark matter perturbation. Due to the influence of the interaction, the growth index can differ from the value without interaction by an amount within the observational sensibility, which provides a possibility to disclose the interaction between dark sectors through future observations on the growth of large structure.
15 pages, 4 figures, revised version, to appear in JCAP
References in corpus (15)
- New Hubble Space Telescope Discoveries of Type Ia Supernovae at z > 1: Narrowing Constraints on the Early Behavior of Dark Energy
- Measuring the Baryon Acoustic Oscillation scale using the SDSS and 2dFGRS
- Large-scale instability in interacting dark energy and dark matter fluids
- Dark Energy-Dark Matter Interaction and putative violation of the Equivalence Principle from the Abell Cluster A586
- Dynamics of dark energy with a coupling to dark matter
- Distinguishing Modified Gravity from Dark Energy
- Growing Matter
- On the growth of linear perturbations
- Thermodynamical description of the interaction between holographic dark energy and dark matter
- Toward a solution of the coincidence problem
- Adiabatic instability in coupled dark energy-dark matter models
- Probing for dynamics of dark energy and curvature of universe with latest cosmological observations
- How to Distinguish Dark Energy and Modified Gravity?
- String inspired explanation for the super-acceleration of our universe
- The transition of equation of state of effective dark energy in the DGP model with bulk contents