Results 21 to 30 of about 49,997 (277)

New horizons in cosmology with spectral distortions of the cosmic microwave background [PDF]

open access: yesExperimental astronomy (Print), 2019
This Voyage 2050 paper highlights the unique science opportunities using spectral distortions of the cosmic microwave background (CMB). CMB spectral distortions probe many processes throughout the history of the Universe, delivering novel information ...
J. Chluba   +29 more
semanticscholar   +1 more source

Anisotropies of the cosmic microwave background [PDF]

open access: yesLa Rivista del Nuovo Cimento, 2002
We review the present status of Cosmic Microwave Background (CMB) anisotropy observations and discuss the main related astrophysical issues, instrumental effects and data analysis techniques. We summarise the balloon-borne and ground-based experiments that, after COBE-DMR, yielded detection or significant upper limits to CMB fluctuations.
M. Bersanelli, D. Maino, A. Mennella
openaire   +5 more sources

Frequency–Redshift Relation of the Cosmic Microwave Background

open access: yesAstronomy, 2023
We point out that a modified temperature–redshift relation (T-z relation) of the cosmic microwave background (CMB) cannot be deduced by any observational method that appeals to an a priori thermalisation to the CMB temperature T of the excited states in ...
Ralf Hofmann, Janning Meinert
doaj   +1 more source

A Measurement of the Cosmic Microwave Background Lensing Potential and Power Spectrum from 500 deg2 of SPTpol Temperature and Polarization Data [PDF]

open access: yesAstrophysical Journal, 2019
We present a measurement of the cosmic microwave background lensing potential using 500 deg2 of 150 GHz data from the SPTpol receiver on the South Pole Telescope.
W. L. K. Wu   +70 more
semanticscholar   +1 more source

Evolution of the cosmic microwave background [PDF]

open access: yesPhysical Review D, 2007
We discuss the time dependence and future of the Cosmic Microwave Background (CMB) in the context of the standard cosmological model, in which we are now entering a state of endless accelerated expansion. The mean temperature will simply decrease until it reaches the effective temperature of the de Sitter vacuum, while the dipole will oscillate as the ...
J. P. Zibin, Adam Moss, Douglas Scott
openaire   +3 more sources

Room for New Physics in the Rayleigh-Jeans Tail of the Cosmic Microwave Background. [PDF]

open access: yesPhysical Review Letters, 2018
We show that, despite stringent constraints on the shape of the main part of the cosmic microwave background (CMB) spectrum, there is considerable room for its modification within its Rayleigh-Jeans (RJ) end, ω≪T_{CMB}.
M. Pospelov   +3 more
semanticscholar   +1 more source

The Cosmic Microwave Background [PDF]

open access: yesAnnales Henri Poincaré, 1989
Plenary talk at TH-2002, UNESCO, Paris, July 22-26, 2002, to be published in Annales Henri Poincar ...
openaire   +6 more sources

Measurements of B -mode polarization of the cosmic microwave background from 500 square degrees of SPTpol data [PDF]

open access: yesPhysical Review D, 2019
We report a B-mode power spectrum measurement from the cosmic microwave background (CMB) polarization anisotropy observations made using the SPTpol instrument on the South Pole Telescope.
J. Sayre   +81 more
semanticscholar   +1 more source

Stringent Limit on Primordial Magnetic Fields from the Cosmic Microwave Background Radiation. [PDF]

open access: yesPhysical Review Letters, 2018
Primordial magnetic fields (PMFs), being present before the epoch of cosmic recombination, induce small-scale baryonic density fluctuations. These inhomogeneities lead to an inhomogeneous recombination process that alters the peaks and heights of the ...
K. Jedamzik, A. Saveliev
semanticscholar   +1 more source

Inflation and the Cosmic Microwave Background [PDF]

open access: yesAstrophysics and Space Science, 1998
7 pages LaTeX file, with two figures incorporated using epsf.
openaire   +7 more sources

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