2015/02/28 by C. Skordis, A. Pourtsidou, E. J. Copeland · 2 citations
Physics and Astronomy · #astro-ph.CO
paper · pdf · doi:10.1103/physrevd.91.083537
published as Phys. Rev. D 91 (2015) 083537 · 11 pages, 2 tables; version accepted for publication in Physical Review D
arxiv created 2015/04/29 · arxiv updated 2015/05/01
We present the most general parametrisation of models of dark energy in the form of a scalar field which is explicitly coupled to dark matter. We follow and extend the Parameterized Post-Friedmannian approach, previously applied to modified gravity theories, in order to include interacting dark energy. We demonstrate its use through a number of worked examples and show how the initially large parameter space of free functions can be significantly reduced and constrained to include only a few non-zero coefficients. This paves the way for a model-independent approach to classify and test interacting dark energy theories.