Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 452, Issue 3, Pages 3038-3046Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stv1495
Keywords
cosmological parameters; dark energy; dark matter
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Funding
- CSIR, Govt of India [09/096 (0749)/2012-EMR-I]
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The paper deals with a theoretical model for interacting dark energy (DE). The interaction between the cold dark matter (dust) and the DE has been assumed to be non-gravitational in nature. Exact analytic cosmological solutions are obtained both for constant and variable EoS for DE. It is found that, for very small value of the coupling parameter (in the interaction term), the model asymptotically extends up to Lambda cold dark matter, while the model can enter into the phantom domain asymptotically, if the coupling parameter is not so small. Both the solutions are then analysed with 194 Supernovae Type Ia data. The best-fitting parameters are shown with 1 sigma and 2 sigma confidence intervals. Finally, we have discussed the cosmographic parameters for both the cases.
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