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• W2963248205 endingPage "039501" @default.
• W2963248205 startingPage "039501" @default.
• W2963248205 abstract "The initial condition $Omega_{rm de}(z_{rm ini})=n^2(1+z_{rm ini})^{-2}/4$ at $z_{rm ini}=2000$ widely used to solve the differential equation of the density of the new agegraphic dark energy (NADE) $Omega_{rm de}$, makes the NADE model be a single-parameter dark-energy cosmological model. However, we find that this initial condition is only applicable in a flat universe with only dark energy and pressureless matter. In fact, in order to obtain more information from current observational data, such as cosmic microwave background (CMB) and baryon acoustic oscillations (BAO), we need to consider the contribution of radiation. For this situation, the initial condition mentioned above becomes invalid. To overcome this shortage, we investigate the evolution of dark energy in the matter-dominated and radiation-dominated epochs, and obtain a new initial condition $Omega_{rm de}(z_{rm ini})=frac{n^2(1+z_{rm ini})^{-2}}{4}(1+sqrt{F(z_{rm ini})})^2$ at $z_{rm ini}=2000$, where $F(z)equivfrac{Omega_{r0}(1+z)}{Omega_{m0}+Omega_{r0}(1+z)}$ with $Omega_{r0}$ and $Omega_{m0}$ being the current density parameters of radiation and pressureless matter, respectively. This revised initial condition is applicable for the differential equation of $Omega_{rm de}$ obtained in the standard Friedmann-Robertson-Walker (FRW) universe with dark energy, pressureless matter, radiation, and even spatial curvature, and can still keep the NADE model being a single-parameter model. With the revised initial condition and the observational data of type Ia supernova (SNIa), CMB and BAO, we finally constrain the NADE model. The results show that the single free parameter $n$ of the NADE model can be constrained tightly." @default.
• W2963248205 created "2019-07-30" @default.
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• W2963248205 date "2013-03-01" @default.
• W2963248205 modified "2023-10-16" @default.
• W2963248205 title "New initial condition of the new agegraphic dark energy model" @default.
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• W2963248205 doi "https://doi.org/10.1088/1674-1056/22/3/039501" @default.
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