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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
Dynamics of interacting dark energy
Physical Review D - Particles, Fields, Gravitation and Cosmology, Volume 79, No. 6, Article 063518, Year 2009
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Description
Dark energy and dark matter are only indirectly measured via their gravitational effects. It is possible that there is an exchange of energy within the dark sector, and this offers an interesting alternative approach to the coincidence problem. We consider two broad classes of interacting models where the energy exchange is a linear combination of the dark sector densities. The first class has been previously investigated, but we define new variables and find a new exact solution, which allows for a more direct, transparent, and comprehensive analysis. The second class has not been investigated in general form before. We give general conditions on the parameters in both classes to avoid unphysical behavior (such as negative energy densities). © 2009 The American Physical Society.
Authors & Co-Authors
Maartens, Roy
United Kingdom, Portsmouth
University of Portsmouth
Statistics
Citations: 213
Authors: 1
Affiliations: 2
Identifiers
Doi:
10.1103/PhysRevD.79.063518
ISSN:
15502368