Test of the Chevallier-Polarski-Linder parametrization for rapid dark energy equation of state transitions
作者： Sebastian Linden , Jean-Marc Virey
DOI: 10.1103/PHYSREVD.78.023526
关键词: Equation of state 、 Parameter space 、 Space (mathematics) 、 Cosmic microwave background 、 Astrophysics 、 Observational cosmology 、 Parametrization 、 Dark energy 、 Physics 、 Baryon 、 Particle physics
摘要: We test the robustness and flexibility of Chevallier-Polarski-Linder (CPL) parametrization dark energy equation state w(z)=w{sub 0}+w{sub a}(z/1+z) in recovering a four-parameter steplike fiducial model. constrain parameter space region underlying model where CPL offers reliable reconstruction. It turns out that non-negligible biases leak into results for recent (z<2.5) rapid transitions, but yields good reconstruction all other cases. The presented analysis is performed with supernova Ia data as forecasted mission like SNAP/JDEM, combined future expectations cosmic microwave background shift R baryonic acoustic oscillation A.
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