Different constraints in the H₀ and Ω_m space based on a flat ΛCDM model. Dark and light contours show the 68% and 95% confidence regions of each posterior, with the exception of the cosmic-age bounds. (For each of those, the parameter space outside the orange regions is excluded if the universe is at least the age given in the label.) Most constraints with different degeneracy directions consistently overlap the region indicated by the guiding white dashed circle. Note that the circle does not represent a joint constraint. Such a common region is, however, not overlapped by the Cepheid-based local determination of H₀ (CV SN) and is only marginally overlapped by the H0LiCOW constraint. Contours correspond to SN P (red), DES (light blue), CC (pink), H0LiCOW (blue), BAO Gal (navy), BAO Lyα (green), γ-ray (orange), WMAP (magenta), Planck (black), CV SN (yellow), and some guiding cosmic-age constraints (t_* = 13.535, 13, and 12.5 Gyr; orange). See the text for descriptions and sources of these constraints. Each constraint in the figure is labeled according to whether it can be changed by nonstandard high-z models (H), mid-z models (M), low-z models (L), or local environmental factors (E). See the text for the definition of these model categories. We leave the H0LiCOW technique without a label because it is relatively insensitive to the underlying cosmological model.