Cosmic Microwave Background Anisotropies: The Power Spectrum and Beyond

Martínez-González, E.

doi:10.1007/978-3-540-44767-2_4

Cited by 4 publications

(2 citation statements)

References 216 publications

(304 reference statements)

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“…The assumption of Gaussianity has been questioned recently with many works detecting deviations from Gaussianity in the WMAP data (for a review see [28]). Although the departures from Gaussianity detected in the WMAP data may simply highlight unremoved foreground contamination or other systematics in the data, which themselves are of importance for cosmological inferences drawn from the data, if the source of these detections is of cosmological origin then this would have important implications for the standard cosmological model.…”

Section: Gaussianity Of the Cmbmentioning

confidence: 99%

Cosmological Applications of a Wavelet Analysis on the Sphere

McEwen

Vielva

Wiaux

et al. 2007

J Fourier Anal Appl

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The cosmic microwave background (CMB) is a relic radiation of the Big Bang and as such it contains a wealth of cosmological information. Statistical analyses of the CMB, in conjunction with other cosmological observables, represent some of the most powerful techniques available to cosmologists for placing strong constraints on the cosmological parameters that describe the origin, content and evolution of the Universe. The last decade has witnessed the introduction of wavelet analyses in cosmology and, in particular, their application to the CMB. We review here spherical wavelet analyses of the CMB that test the standard cosmological concordance model. The assumption that the temperature anisotropies of the CMB are a realisation of a statistically isotropic Gaussian random field on the sphere is questioned. Deviations from both statistical isotropy and Gaussianity are detected in the reviewed works, suggesting more exotic cosmological models may be required to explain our Universe. We also review spherical wavelet analyses that independently provide evidence for dark energy, an exotic component of our Universe of which we know very little currently. The effectiveness of accounting correctly for the geometry of the sphere in the wavelet analysis of full-sky CMB data is demonstrated by the highly significant detections of physical processes and effects that are made in these reviewed works.

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Section: Gaussianity Of the Cmbmentioning

confidence: 99%

Cosmological Applications of a Wavelet Analysis on the Sphere

McEwen

Vielva

Wiaux

et al. 2007

J Fourier Anal Appl

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“…In particular, a significant number of works have reported deviations from Gaussianity and/or isotropy, whose origin is uncertain (e.g. [35,17,20,12,13,15,26,37], see also [25] for a review).…”

Section: Introductionmentioning

confidence: 99%

Gaussian Analysis of the CMB with the Smooth Tests of Goodness of Fit

Barreiro

Rubiño-Martín

Martínez-González

Highlights of Spanish Astrophysics IV

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The study of the Gaussianity of the cosmic microwave background (CMB) radiation is a key topic to understand the process of structure formation in the Universe. In this paper, we review a very useful tool to perform this type of analysis, the Rayner & Best smooth tests of goodness of fit. We describe how the method has been adapted for its application to imaging and interferometric observations of the CMB and comment on some recent and future applications of this technique to CMB data.

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The Large-Scale Structure in the Universe: From Power Laws to Acoustic Peaks

Martı́nez

2008

Data Analysis in Cosmology

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The most popular tools for analysing the large scale distribution of galaxies are second-order spatial statistics such as the two-point correlation function or its Fourier transform, the power spectrum. In this review, we explain how our knowledge of cosmic structures, encapsulated by these statistical descriptors, has evolved since their first use when applied on the early galaxy catalogues to the present generation of wide and deep redshift surveys. 1

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Cosmic Microwave Background Anisotropies: The Power Spectrum and Beyond

Cited by 4 publications

References 216 publications

Cosmological Applications of a Wavelet Analysis on the Sphere

Cosmological Applications of a Wavelet Analysis on the Sphere

Gaussian Analysis of the CMB with the Smooth Tests of Goodness of Fit

The Large-Scale Structure in the Universe: From Power Laws to Acoustic Peaks

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