An interacting model for the cosmological dark sector

Abstract

We discuss a new interacting model for the cosmological dark sector in which the attenuated dilution of cold dark matter scales as $a^{-3}f(a)$, where f(a) is an arbitrary function of the cosmic scale factor $a$. From thermodynamic arguments, we show that f(a) is proportional to entropy source of the particle creation process. In order to investigate the cosmological consequences of this kind of interacting models, we expand f(a) in a power series and viable cosmological solutions are obtained. Finally, we use current observational data to place constraints on the interacting function f(a).

5 pages, 3 figures, Phys. Rev. D (in press)

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Cited by in corpus (4)

• On the equivalence of Lambda(t) and gravitationally induced particle production cosmologies
• Physical constraints on interacting dark energy models
• Emergent Universe with Interacting fluids and Generalized Second Law of Thermodynamics
• A possible analogy between the dynamics of a skydiver and a scalar field: cosmological consequences