Results 41 to 50 of about 207,749 (157)
POLAR: Instrument and Results [PDF]
, 2002 We describe the design, performance, and results of a polarimeter used to make precision measurements of the 2.7 K cosmic microwave background. In the Spring of 2000 the instrument searched for polarized emission in three microwave frequency bands ...
de Oliveira-Costa, Angelica +6 more
core +1 more source
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 +2 more
doaj +1 more source
Isotherms clustering in cosmic microwave background [PDF]
Phys.Lett. A360 (2006) 210-216, 2006 Since the strong clustering of luminous matter in the observable universe is a consequence of an initial non-uniformity of the baryon-photon fluid in the last scattering surface, an investigation of clustering of the isotherms in the cosmic microwave background has been performed.
arxiv +1 more source
Non-Gaussianity and the Cosmic Microwave Background Anisotropies
Advances in Astronomy, 2010 We review in a pedagogical way the present status of the impact of non-Gaussianity (NG) on the cosmic microwave background (CMB) anisotropies. We first show how to set the initial conditions at second order for the CMB anisotropies when some primordial ...
N. Bartolo, S. Matarrese, A. Riotto
doaj +1 more source
Anisotropic universes with isotropic cosmic microwave background radiation [PDF]
Class.Quant.Grav. 18 (2001) 5583-5590, 1999 We show the existence of spatially homogeneous but anisotropic cosmological models whose cosmic microwave background temperature is exactly isotropic at one instant of time but whose rate of expansion is highly anisotropic. The existence of these models shows that the observation of a highly isotropic cosmic microwave background temperature cannot ...
arxiv +1 more source
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 +16 more
core +6 more sources
Delensing of Cosmic Microwave Background Polarization with Machine Learning
The Astrophysical Journal Supplement Series, 2023 Primordial B -mode detection is one of the main goals of next-generation cosmic microwave background (CMB) experiments. Primordial B -modes are a unique signature of primordial gravitational waves (PGWs).
Ye-Peng Yan +3 more
doaj +1 more source
Probing the statistic in the cosmic microwave background [PDF]
Mod.Phys.Lett.A24:1187-1192,2009, 2009 Kolmogorov's statistic is used for the analysis of properties of perturbations in the Cosmic Microwave Background signal. We obtain the maps of the Kolmogorov stochasticity parameter for W and V band temperature data of WMAP which are differently affected by the Galactic disk radiation and then we model datasets with various statistic of perturbations.
arxiv +1 more source
Kolmogorov cosmic microwave background sky
, 2009 A new map of the sky representing the degree of randomness in the cosmic microwave background (CMB) temperature has been obtained. The map based on estimation of the Kolmogorov stochasticity parameter clearly distinguishes the contribution of the ...
A. A. Kocharyan +26 more
core +1 more source
Cosmic Microwave Background Anisotropy Observing Strategy Assessment [PDF]
, 1996 I develop a method for assessing the ability of an instrument, coupled with an observing strategy, to measure the angular power spectrum of the cosmic microwave background (CMB).
Lloyd Knox, Tegmark M.
core +2 more sources