Breaking parameter degeneracy in interacting dark energy models from observations |
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Authors: | Xiao-Dong XuJian-Hua He Bin Wang |
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Affiliation: | a Department of Physics, Fudan University, 200433 Shanghai, China b INPAC and Department of Physics, Shanghai Jiao Tong University, 200240 Shanghai, China |
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Abstract: | We study the interacting dark energy model with time varying dark energy equation of state. We examine the stability in the perturbation formalism and the degeneracy among the coupling between dark sectors, the time-dependent dark energy equation of state and dark matter abundance in the cosmic microwave background radiation. Further we discuss the possible ways to break such degeneracy by doing global fitting using the latest observational data and we get a tight constraint on the interaction between dark sectors. |
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Keywords: | Dark matter Dark energy Interaction Cosmological constraints |
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