Joint<i>Planck</i>and WMAP CMB map reconstruction

Bobin, J.; Sureau, F.; Starck, Jean-Luc; Rassat, A.; Paykari, P.

doi:10.1051/0004-6361/201322372

Cited by 69 publications

(118 citation statements)

References 30 publications

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“…• we removed the cosmological CMB and KSZ signals subtracting the LGMCA CMB template [54,55] at each Planck channel. It has been previously demonstrated that this step does not introduce any distortion to the TSZ emission [32];…”

Section: B Foreground Cleaned Planck Nominal Mapsmentioning

confidence: 99%

Constraining spatial variations of the fine structure constant using clusters of galaxies and Planck data

et al. 2016

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We propose an improved methodology to constrain spatial variations of the fine structure constant using clusters of galaxies. We use the Planck 2013 data to measure the thermal Sunyaev-Zeldovich effect at the location of 618 X-ray selected clusters. We then use a Monte Carlo Markov Chain algorithm to obtain the temperature of the Cosmic Microwave Background at the location of each galaxy cluster. When fitting three different phenomenological parameterizations allowing for monopole and dipole amplitudes in the value of the fine structure constant we improve the results of earlier analysis involving clusters and the CMB power spectrum, and we also found that the best-fit direction of a hypothetical dipole is compatible with the direction of other known anomalies. Although the constraining power of our current datasets do not allow us to test the indications of a fine-structure constant dipole obtained though high-resolution optical/UV spectroscopy, our results do highlight that clusters of galaxies will be a very powerful tool to probe fundamental physics at low redshift.

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Section: B Foreground Cleaned Planck Nominal Mapsmentioning

confidence: 99%

Constraining spatial variations of the fine structure constant using clusters of galaxies and Planck data

et al. 2016

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“…This choice was motivated by the contamination of the Planck official CMB maps by tSZ residuals (see e.g. Bobin et al 2014), which would bias our analysis. We also show in Sect.…”

Section: Datamentioning

confidence: 99%

Cosmological constraints from the observed angular cross-power spectrum between Sunyaev-Zel’dovich and X-ray surveys

Hurier

Douspis

Aghanim

et al. 2015

A&A

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We present the first detection of the cross-correlation angular power spectrum between the thermal Sunyaev-Zel'dovich (tSZ) effect and the X-ray emission over the full sky. The tSZ effect and X-rays are produced by the same hot gas within groups and clusters of galaxies, which creates a naturally strong correlation between them that can be used to boost the joint signal and derive cosmological parameters. We computed the correlation between the ROSAT All Sky Survey in the 0.5−2 keV energy band and the tSZ effect reconstructed from six Planck all-sky frequency maps between 70 and 545 GHz. We detect a significant correlation over a wide range of angular scales. In the range 50 < < 2000, the cross-correlation of X-rays to tSZ is detected at an overall significance of 28σ. As part of our systematic study, we performed a multi-frequency modelling of the AGN contamination and the correlation between cosmic infra-red background and X-rays. Taking advantage of the strong dependence of the cross-correlation signal on the amplitude of the power spectrum, we constrained σ 8 = 0.804 ± 0.037, where modelling uncertainties dominate statistical and systematic uncertainties. We also derived constraints on the mass indices of scaling relations between the halo mass and X-ray luminosity, L 500 −M 500 , and SZ signal, Y 500 −M 500 , a sz + a x = 3.37 ± 0.09, and on the indices of the extra-redshift evolution, β sz + β x = 0.4 +0.4 −0.5 .

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“…Planck has effectively imaged CMB temperature modes at scales < 2000 to nearly the cosmic variance limit (even if considering a foreground cleaned map like SMICA [57] or LGMCA [12,13]). The CMB halo lensing signal can be contaminated by both noise and systematic biases from cluster foregrounds such as tSZ and CIB.…”

Section: Cmb Halo Lensingmentioning

confidence: 99%

Fundamental physics from future weak-lensing calibrated Sunyaev-Zel’dovich galaxy cluster counts

2017

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Future high-resolution measurements of the cosmic microwave background (CMB) will produce catalogs of tens of thousands of galaxy clusters through the thermal Sunyaev-Zel'dovich (tSZ) effect. We forecast how well different configurations of a CMB Stage-4 experiment can constrain cosmological parameters, in particular the amplitude of structure as a function of redshift σ8(z), the sum of neutrino masses Σmν , and the dark energy equation of state w(z). A key element of this effort is calibrating the tSZ scaling relation by measuring the lensing signal around clusters. We examine how the mass calibration from future optical surveys like the Large Synoptic Survey (LSST) compares with a purely internal calibration using lensing of the CMB itself. We find that, due to its high-redshift leverage, internal calibration gives constraints on cosmological parameters comparable to the optical calibration, and can be used as a cross-check of systematics in the optical measurement. We also show that in contrast to the constraints using the CMB lensing power spectrum, lensing-calibrated tSZ cluster counts can detect a minimal Σmν at the 3-5σ level even when the dark energy equation of state is freed up.

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JointPlanckand WMAP CMB map reconstruction

Cited by 69 publications

References 30 publications

Constraining spatial variations of the fine structure constant using clusters of galaxies and Planck data

Constraining spatial variations of the fine structure constant using clusters of galaxies and Planck data

Cosmological constraints from the observed angular cross-power spectrum between Sunyaev-Zel’dovich and X-ray surveys

Fundamental physics from future weak-lensing calibrated Sunyaev-Zel’dovich galaxy cluster counts

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