Testing the interaction between dark energy and dark matter via latest observations
Cosmology and Nongalactic Astrophysics
2011-03-22 v3 General Relativity and Quantum Cosmology
High Energy Physics - Theory
Abstract
Cosmological analysis based on currently available observations are unable to rule out a sizeable coupling between dark energy and dark matter. However, the signature of the coupling is not easy to grasp, since the coupling is degenerate with other cosmological parameters, such as the dark energy equation of state and the dark matter abundance. We discuss the possible ways to break such degeneracy. Based on the perturbation formalism, we carry out the global fitting by using latest observational data and get a tight constraint on the interaction between dark sectors. We find that the appropriate interaction can alleviate the coincidence problem.
Keywords
Cite
@article{arxiv.1012.3904,
title = {Testing the interaction between dark energy and dark matter via latest observations},
author = {Jian-Hua He and Bin Wang and Elcio Abdalla},
journal= {arXiv preprint arXiv:1012.3904},
year = {2011}
}
Comments
13 pages, 5 figures, revised version, accepted for publication in Phys. Rev. D