Planck 2018 results
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Table 5.

Constraints on standard cosmological parameters from Planck TT,TE,EE+lowE+lensing when the base-ΛCDM model is extended by varying additional parameters.

Parameter(s) Ωbh2 Ωch2 100θMC H0 ns ln(1010As)
Base ΛCDM …… 0.02237 ± 0.00015 0.1200 ± 0.0012 1.04092 ± 0.00031 67.36 ± 0.54 0.9649 ± 0.0042 3.044 ± 0.014
r …… 0.02237 ± 0.00014 0.1199 ± 0.0012 1.04092 ± 0.00031 67.40 ± 0.54 0.9659 ± 0.0041 3.044 ± 0.014
dns/dlnk …… 0.02240 ± 0.00015 0.1200 ± 0.0012 1.04092 ± 0.00031 67.36 ± 0.53 0.9641 ± 0.0044 3.047 ± 0.015
dns/dlnk, r …… 0.02243 ± 0.00015 0.1199 ± 0.0012 1.04093 ± 0.00030 67.44 ± 0.54 0.9647 ± 0.0044 3.049 ± 0.015
d2ns/dlnk2, dns/dlnk …… 0.02237 ± 0.00016 0.1202 ± 0.0012 1.04090 ± 0.00030 67.28 ± 0.56 0.9625 ± 0.0048 3.049 ± 0.015
Neff …… 0.02224 ± 0.00022 0.1179 ± 0.0028 1.04116 ± 0.00043 66.3 ± 1.4 0.9589 ± 0.0084 3.036 ± 0.017
Neff, dns/dlnk …… 0.02216 ± 0.00022 0.1157 ± 0.0032 1.04144 ± 0.00048 65.2 ± 1.6 0.950 ± 0.011 3.034 ± 0.017
Σmν …… 0.02236 ± 0.00015 0.1201 ± 0.0013 1.04088 ± 0.00032 0.9647 ± 0.0043 3.046 ± 0.015
Σmν, Neff …… 0.02221 ± 0.00022 1.04116 ± 0.00044 0.9582 ± 0.0086 3.037 ± 0.017
……
α−1 …… 0.02238 ± 0.00015 0.1201 ± 0.0015 1.04087 ± 0.00043 67.30 ± 0.67 0.9645 ± 0.0061 3.045 ± 0.014
w0 …… 0.02243 ± 0.00015 0.1193 ± 0.0012 1.04099 ± 0.00031 0.9666 ± 0.0041 3.038 ± 0.014
ΩK …… 0.02249 ± 0.00016 0.1185 ± 0.0015 1.04107 ± 0.00032 0.9688 ± 0.0047
YP …… 0.02230 ± 0.00020 0.1201 ± 0.0012 1.04067 ± 0.00055 67.19 ± 0.63 0.9621 ± 0.0070 3.042 ± 0.016
YP, Neff …… 0.02224 ± 0.00022 1.0415 ± 0.0012 0.9589 ± 0.0085 3.036 ± 0.018
AL …… 0.02251 ± 0.00017 0.1182 ± 0.0015 1.04110 ± 0.00032 68.16 ± 0.70 0.9696 ± 0.0048

Notes. The constraint on τ is also stable but not shown for brevity; however, we include H0 (in  km s−1 Mpc−1) as a derived parameter (which is very poorly constrained from Planck alone in the ΛCDM+w0 extension). Here α−1 is a matter isocurvature amplitude parameter, following PCP15. All limits are 68% in this table. The results assume standard BBN except when varying YP independently (which requires non-standard BBN). Varying AL is not a physical model (see Sect. 6.2)

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