Fig. 5 from Type Ia Supernova Discoveries at z > 1 from the Hubble Space Telescope: Evidence for Past Deceleration and Constraints on Dark Energy Evolution

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Type Ia Supernova Discoveries at z > 1 from the Hubble Space Telescope: Evidence for Past Deceleration and Constraints on Dark Energy Evolution

Authors: Adam G. Riess, Louis-Gregory Strolger, John Tonry, Stefano Casertano, Henry C. Ferguson, Bahram Mobasher, Peter Challis, Alexei V. Filippenko, Saurabh Jha, Weidong Li, Ryan Chornock, Robert P. Kirshner, Bruno Leibundgut, Mark Dickinson, Mario Livio, Mauro Giavalisco, Charles C. Steidel, Txitxo Benítez, and Zlatan Tsvetanov

Riess et al. 2004 The Astrophysical Journal 607 665.

Provider: AAS Journals

Caption: Fig. 5.

Left: Joint confidence intervals for a two‐parameter model of the expansion history, ﹩q( z) =q_{0}+z\, dq/ dz﹩, from SNe Ia. The top left shows the constraints derived from the gold sample; the bottom left includes both gold and silver samples. For either set, the data favor the quadrant with recent acceleration (﹩q_{0}< 0﹩) and past deceleration (﹩dq/ dz> 0﹩) with high confidence. Lines of fixed transition redshift [﹩q( z_{t}) =0﹩] are shown. Right: Illustration of the likelihood function for the transition redshifts derived from the same samples.

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