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 correlation coefficient of 
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Louis, Thibaut; Li, Zack; Tristram, M.

doi:10.1103/physrevd.100.103534

Cited by 9 publications

(8 citation statements)

References 28 publications

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“…While the approximation of Gaussianity is excellent for CMB power spectra at multipoles ≥ 30, it is not straightforward that it holds for a non linear combination of power spectra. However, the Gaussianity of the correlation coefficient has been shown to be a good assumption in the high EE signal-to-noise regime [15]. We check the robustness of this approximation running MCMC chains for the set of simulations described in section II.…”

Section: B R Te -Based Likelihood Constructionmentioning

confidence: 99%

“…An analytical expression for α b is given in appendix A. The expression for the covariance matrix of the R TE b estimator was also derived in [15], the generalization of the expression to a multifrequency case is given by…”

Section: A Likelihood For the Pearson's Correlation Coefficient Of T ...mentioning

confidence: 99%

“…Correlation coefficients have also been used to look at the correlations between galaxy surveys and CMB-derived lensing power spectrum in an unbiased way [14]. R TE statistical properties have been discussed in details in [15]. This observable has been shown to be robust against multiplicative instrumental systematics, such as beam error, calibration, polarization efficiency uncertainties or unmodelled transfer functions.…”

Section: Introductionmentioning

confidence: 99%

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Cosmology with Planck T-E correlation coefficient

La Posta,

Louis,

Garrido

et al. 2021

Preprint

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Tensions in cosmological parameters measurement motivate a revisit of the effects of instrumental systematics. In this article, we focus on the Pearson's correlation coefficient of the cosmic microwave background temperature and polarization E modes R TE which has the property of not being biased by multiplicative instrumental systematics. We build a R TE -based likelihood for the Planck data, and present the first constraints on ΛCDM parameters from the correlation coefficient. Our results are compatible with parameters derived from a power spectra based likelihood. In particular the value of the Hubble parameter H0 characterizing the expansion of the Universe today, 67.5 ± 1.3 km/s/Mpc, is consistent with the ones inferred from standard CMB analysis. We also discuss the consistency of the Planck correlation coefficient with the one computed from the most recent ACTPol power spectra.

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Section: B R Te -Based Likelihood Constructionmentioning

confidence: 99%

Section: A Likelihood For the Pearson's Correlation Coefficient Of T ...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Cosmology with Planck T-E correlation coefficient

La Posta,

Louis,

Garrido

et al. 2021

Preprint

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“…Given the importance for the cosmology landscape, assessing the robustness of the results has become a major endeavor for all collaborations and analyses. The quantity and quality of CMB observations has both allowed and demanded an increasing level of scrutiny of the results and of the assumptions made in deriving them (see, e.g., [6][7][8][9][10][11][12]). For example, in CMB analyses one can derive cosmological parameters using only a subset of scales or frequencies or probes, making different assumptions in analysis methodology such as using or relaxing priors, applying calibrations in different ways etc., and verify that within the expected statistical uncertainty the estimates are consistent.…”

Section: Introductionmentioning

confidence: 99%

Assessing consistency between CMB temperature and polarization measurements, with application to Planck, ACT and SPT

Posta¹,

Natale²,

Calabrese³

et al. 2022

Preprint

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Planck 's Cosmic Microwave Background temperature and polarization observations are the premier dataset for constraining cosmological models. Cosmic variance limited temperature at large and intermediate scales today dominates the constraints; polarization provides additional constraining power and further scrutiny of the models. To complete this picture from Planck, ground-based experiments, such as the Atacama Cosmology Telescope (ACT ) and the South Pole Telescope (SPT ) continue to add temperature and polarization measurements at small scales, allowing for the extraction of competitive cosmological constraints from the T E and EE power spectra. Matching at the same time all these stringent probes is a key challenge and validation step for any cosmological model. In particular, ΛCDM requires a tight consistency between the temperature and polarization measurements. In this paper, we present a number of methods to identify and quantify possible inconsistencies between temperature and polarization, we apply them to the latest Planck, ACT and SPT data and find no evidence for a deviation from ΛCDM. Application of these methods will have increased importance for future, more constraining CMB data.

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“…In the meantime, independent measurements by ground-based CMB experiments, including the Atacama Cosmology Telescope (ACT) [3] and the South Pole Telescope (SPT-3G) [4], have confirmed the preference for a lower value of the Hubble constant inferred from the CMB when assuming the standard ΛCDM model, with H ACT 0 = 68.4 ± 1.5 km/s/Mpc [5,6] and H SPT−3G 0 = 68.8 ± 1.5 km/s/Mpc [4]. In addition, a re-analysis of the Planck data using the Pearson correlation coefficient of T and E modes R TE , an observable insensitive to multiplicative systematics, has lead to another robust determination of H Planck,R TE 0 = 67.5 ± 1.3 km/s/Mpc [7,8].…”

Section: Introductionmentioning

confidence: 99%

Constraints on Pre-Recombination Early Dark Energy from SPT-3G Public Data

La Posta,

Louis,

Garrido

et al. 2021

Preprint

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Early dark energy (EDE) is a proposed solution to the Hubble tension in which a new cosmological field accelerates cosmic expansion prior to recombination and reduces the physical size of the sound horizon. In previous work, a slight preference for a non-zero EDE contribution was found in the latest Atacama Cosmology Telescope data (ACT DR4), while the Planck satellite legacy data alone do not show evidence for it. In this work, we use the most recent public data from the South Pole Telescope (SPT-3G) to constrain the parameters of the EDE scenario. We find that at the current precision level of SPT-3G, an EDE contribution to the total energy density of the universe prior to recombination of ∼ 10% can not be ruled out, but that the data are also consistent with no EDE. The combination of ACT DR4 and SPT-3G with the Planck large-scale temperature anisotropy measurement shows a hint (2.6σ) for non-zero EDE; however, this preference disappears when the full Planck 2018 data set is included.

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TE correlation coefficient of Planc

Cited by 9 publications

References 28 publications

Cosmology with Planck T-E correlation coefficient

Cosmology with Planck T-E correlation coefficient

Assessing consistency between CMB temperature and polarization measurements, with application to Planck, ACT and SPT

Constraints on Pre-Recombination Early Dark Energy from SPT-3G Public Data

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