Title: Stationary dark energy with a baryon-dominated era: Solving the coincidence problem with a linear coupling
Abstract: We show that all cosmological models with an accelerated stationary global attractor reduce asymptotically to a dark energy field with an exponential potential coupled linearly to a perfect fluid dark matter. In such models the abundance of the dark components reaches a stationary value and therefore the problem of their present coincidence is solved. The requirement of a vanishing coupling of the baryons in order to pass local gravity experiments induces the existence of an intermediate baryon-dominated era. We discuss in detail the properties of these models and show that to accommodate standard nucleosynthesis they cannot produce a microwave background consistent with observations. We conclude that, among stationary models, only a time-dependent coupling or equation of state might provide a realistic cosmology.
Publication Year: 2002
Publication Date: 2002-02-28
Language: en
Type: article
Indexed In: ['crossref', 'datacite']
Access and Citation
Cited By Count: 138
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot