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Evolution of Dark Energy Reconstructed from the Latest Observations

  • Authors: Yuting Wang, Levon Pogosian, Gong-Bo Zhao, and Alex Zucca

2018 The Astrophysical Journal Letters 869 L8.

  • Provider: AAS Journals

Caption: Figure 1.

Panel (A): X(z) (best-fit and 68% CL uncertainty) reconstructed using our standard correlated prior (blue filled band) compared to X(z) derived from ﹩{w}_{\mathrm{DE}}^{\mathrm{eff}}(z)﹩ reconstructed in Zhao et al. (2017; black curves and a data point with error bars); panel (B): the reconstructed effective DE pressure ﹩Y(z)\,\equiv {P}_{\mathrm{DE}}^{\mathrm{eff}}(z)/{\rho }_{\mathrm{DE}}^{\mathrm{eff}}(0);﹩ panel (C): the reconstructed deceleration parameter q(z). For reconstructions in panels (A)–(C), the range of variation of X in each bin is set by ΔX = 4. Panels (D)–(F): the same quantities as in panels (A)–(C) but reconstructed using ΔX = 0.09 (black solid curves), and the evidence-weighted reconstruction defined in Equation (2) (blue filled band). The wine dashed–dotted curves in panels (C) and (F) show the best-fit q(z) in ΛCDM, and the dashed horizontal lines show q = 0 to guide the eye. The dashed horizontal lines in panels (A), (B), (D), (E) correspond to the ΛCDM model.

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