Results 71 to 80 of about 128,427 (267)

Cosmic Microwave Background Anisotropies [PDF]

Annual Review of Astronomy and Astrophysics, 2002
▪ Abstract  Cosmic microwave background (CMB) temperature anisotropies have and will continue to revolutionize our understanding of cosmology. The recent discovery of the previously predicted acoustic peaks in the power spectrum has established a working cosmological model: a critical density universe consisting of mainly dark matter and dark energy ...
Wayne Hu, Scott Dodelson
openaire   +3 more sources

Primordial Nucleosynthesis, Cosmic Microwave Background and Neutrinos [PDF]

, 2000
We report the results of a recent likelihood analysis combining the primordial nucleosynthesis and the BOOMERanG and MAXIMA-1 data on cosmic microwave background radiation anisotropies.
Mangano, G., Melchiorri, A., Pisanti, O.
core   +2 more sources

Uncovering the history of cosmic inflation from anomalies in cosmic microwave background spectra

European Physical Journal C: Particles and Fields, 2022
We propose an inflationary primordial feature model that can explain both the large and small-scale anomalies in the currently measured cosmic microwave background anisotropy spectra, revealing a clip of adventurous history of the Universe during its ...
Matteo Braglia, Xingang Chen, Dhiraj Kumar Hazra   +2 more
doaj   +1 more source

Cosmic Microwave Background Temperature at Galaxy Clusters [PDF]

, 2002
We have deduced the cosmic microwave background (CMB) temperature in the Coma cluster (A1656, $z=0.0231$), and in A2163 ($z=0.203$) from spectral measurements of the Sunyaev-Zel'dovich (SZ) effect over four passbands at radio and microwave frequencies ...
A. Cooray, A. Melchiorri, E. Palladino, E. S. Battistelli, F. Melchiorri, Fabbri R., G. Savini, L. Lamagna, M. De Petris, M. Shimon, Sunyaev R. A., Sunyaev R. A., Y. Rephaeli   +12 more
core   +4 more sources

Cosmic Strings and Their Induced Non-Gaussianities in the Cosmic Microwave Background

Advances in Astronomy, 2010
Motivated by the fact that cosmological perturbations of inflationary quantum origin were born Gaussian, the search for non-Gaussianities in the cosmic microwave background (CMB) anisotropies is considered as the privileged probe of nonlinear physics in ...
Christophe Ringeval
doaj   +1 more source

Cosmic microwave background constraints on primordial black hole dark matter [PDF]

, 2016
We revisit cosmic microwave background (CMB) constraints on primordial black hole dark matter. Spectral distortion limits from COBE/FIRAS do not impose a relevant constraint. Planck CMB anisotropy power spectra imply that primordial black holes with mBH≳
Daniel Aloni, Kfir Blum, R. Flauger
semanticscholar   +1 more source

INFLATION AND THE COSMIC MICROWAVE BACKGROUND [PDF]

The New Cosmology, 2005
34 pages, 13 figures, contributed chapter to " Proceedings of the New Cosmology Summer School" edt. M. Colless, to be published by World Scientific, 2003. Based on five lectures given at the 16th Canberra International Summer School "The New Cosmology" held 3-14 February at the Australian National University.
openaire   +4 more sources

Recent results and perspectives on cosmology and fundamental physics from microwave surveys [PDF]

, 2015
Recent cosmic microwave background data in temperature and polarization have reached high precision in estimating all the parameters that describe the current so-called standard cosmological model.
Alighieri, Sperello Di Serego, Battistelli, Elia Stefano, Benetti, Micol, Burigana, Carlo, Cabass, Giovanni, De Bernardis, Paolo, Di Valentino, Eleonora, Gerbino, Martina, Giusarma, Elena, Gruppuso, Alessandro, Liguori, Michele, Masi, Silvia, Norgaard-Nielsen, Hans Ulrik, Rosati, Piero, Salvati, Laura, Trombetti, Tiziana, Vielva, Patricio   +16 more
core   +6 more sources

On the (Higher Multipoles) Variance Asymmetry in the Cosmic Microwave Background

The Astrophysical Journal
We have studied the cosmic microwave background (CMB) map looking for features beyond cosmological isotropy. We began by tiling the CMB variance maps (which are produced by different smoothing scales) with stripes of different sizes along the most ...
MohammadHossein Jamshidi, Abdolali Banihashemi, Nima Khosravi   +2 more
doaj   +1 more source

Adapted Method for Separating Kinetic SZ Signal from Primary CMB Fluctuations

EURASIP Journal on Advances in Signal Processing, 2005
In this first attempt to extract a map of the kinetic Sunyaev-Zel'dovich (KSZ) temperature fluctuations from the cosmic microwave background (CMB) anisotropies, we use a method which is based on simple and minimal assumptions.
Forni Olivier, Aghanim Nabila
doaj   +1 more source