CMB from Planck 2018¶. @article{Aghanim2020Planck2R, title={Planck 2018 results. Cosmological parameters 3 where ns is known as the spectral index, always deﬁned so that ns = 1 for the Harrison–Zeldovich spectrum, and k∗ is an arbitrarily chosen scale. ... Antony and Planck Collaboration, (2020) Planck 2018 results. VI. ... We present cosmological parameter results from the final full-mission Planck measurements of the cosmic microwave background (CMB) anisotropies, combining information from the temperature and polarization maps and the lensing reconstruction. The angular acoustic scale is measured to 0.03% precision, with 100θ∗ = 1.0411±0.0003.Theseresultsareonlyweaklydependentonthecosmologicalmodelandremainstable,withsomewhatincreasederrors, in many commonly considered extensions. Assuming the base-ΛCDM cosmology, the inferred (model-dependent) late-Universe parameters are: HubbleconstantH0 = (67.4±0.5)kms−1Mpc−1;matterdensityparameterΩm = 0.315±0.007;andmatterﬂuctuationamplitudeσ8 = 0.811±0.006. Combining with baryon acoustic oscillation (BAO) measurements (and consideringsingle-parameterextensions)weconstraintheeﬀectiveextrarelativisticdegreesoffreedomtobe Neﬀ = 2.99±0.17,inagreementwith the Standard Model prediction Neﬀ = 3.046, and ﬁnd that the neutrino mass is tightly constrained toPmν < 0.12 eV. Gravitational lensing • Planck 2018 results. VIII. BN1 9RH Cosmological parameters; Planck Collaboration (2018) So, with all the data in, what can we say yes-and-no to when it comes to the Universe and what it's made of? They are based on Planck HFI data and Planck lensing, as well as additional non-CMB data as detailed in the main parameter papers. VI. VI.

Planck was a space observatory operated by the European Space Agency (ESA) from 2009 to 2013, which mapped the anisotropies of the cosmic microwave background (CMB) at microwave and infra-red frequencies, with high sensitivity and small angular resolution.The mission substantially improved upon observations made by the NASA Wilkinson Microwave Anisotropy Probe (WMAP). Astronomy and Astrophysics Supplement Series, 641. a6 1-73. & Isotropy and statistics. Planck 2018 Results: Cosmological Parameter Tables July 9, 2018 Abstract These tables summarize the results of Planck 2018 parameter estimation exploration results. We describe the multi-component sky as seen by Planck, the success of the ΛCDM model, and the connection to lower-redshift probes of structure formation. 24. The CMB spectra continue to prefer higher lensing amplitudesthan predicted in base ΛCDM at over 2σ, which pulls some parameters that aﬀect thelensing amplitude away from the ΛCDM model; however, this is not supported by the lensing reconstruction or (in models that also change the background geometry) BAOdata.ThejointconstraintwithBAOmeasurementsonspatialcurvatureisconsistentwithaﬂatuniverse, ΩK = 0.001±0.002.Alsocombining with Type Ia supernovae (SNe), the dark-energy equation of state parameter is measured to be w0 = −1.03±0.03, consistent with a cosmological constant. We present cosmological parameter results from the ﬁnal full-mission Planck measurements of the cosmic microwave background (CMB) anisotropies, combining information from the temperature and polarization maps and the lensing reconstruction. AU - Planck Collaboration. cosmological parameters; planck collaboration (2018)) So, with all the data in, what can we say yes-and-no to when it comes to the Universe and what it’s made of? Planck provided a major source of information relevant to several cosmological and astrophysical issues, such as testing theories of the early Universe and the origin of cosmic structure. Cosmological parameters. VI. Article citations. Planck 2018 results. Cosmological parameters Planck Collaboration: N. Aghanim54, Y. Akrami15;57;59, M. Ashdown65;5, J. Aumont95, C. Baccigalupi78, M. Ballardini21;41, A. J. Banday95;8, R. B. Barreiro61, N. Bartolo29;62, S. Basak85, R. Battye64, K. Benabed55;90, J.-P. Bernard95;8, M. Bersanelli32;45, P. Bielewicz75;78, J. J. Bock63;10, VI. @article{Aghanim2020Planck2R, title={Planck 2018 results. Planck 2018 Results: Cosmological Parameter Tables July 9, 2018 Abstract These tables summarize the results of Planck 2018 parameter estimation exploration results. 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