Planck 2018 results
Free Access

Fig. 14.


Successive reductions in the allowed parameter space for various one-parameter extensions to ΛCDM, from pre-WMAP (the MAXIMA, DASI, BOOMERANG, VSA, and DASI experiments) to Planck. Each row corresponds to a specific extended model. The contours display the 68% and 95% confidence limits for the extra parameter versus five other base-ΛCDM parameters. The dotted lines indicate the ΛCDM best-fit parameters or fixed default values of the extended parameters.

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