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Research PapersNo Access

SPATIAL RICCI SCALAR DARK ENERGY MODEL

College of Physical Science and Technology, Hebei University, Baoding 071002, China

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Department of Astronomy, Beijing Normal University, Beijing 100875, China

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The National Astronomical Observatories, Chinese Academy of Science, Beijing 100012, China

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https://doi.org/10.1142/S0217751X11051263Cited by:18 (Source: Crossref)

Abstract

Inspired by the holographic principle, we suggest that the density of dark energy is proportional to the spatial Ricci scalar curvature (SRDE). Such a model is phenomenologically viable. The best fit values of its parameters at 68% confidence level are found to be Ω_{m 0} = 0.259±0.016 and α = 0.261±0.0122, constrained from the Union+CFA3 sample of 397 SNIa and the BAO measurement. We find that the equation of state of SRDE crosses -1 at z ≃ -0.14. The present value of the deceleration parameter q(z) for SRDE is found to be q_{z = 0}~-0.85. The phase transition from deceleration to acceleration of the Universe for SRDE occurs at the redshift z_{q = 0}~0.4. After studying the perturbation of each component of the Universe, we show that the matter power spectra and cosmic microwave background temperature anisotropy are slightly affected by SRDE, compared with ΛCDM.

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PACS: 95.36.+x, 98.80.-k, 98.80.Es

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Vol. 26, No. 02

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Received 13 September 2010

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