Measurements of B -mode polarization of the cosmic microwave background from 500 square degrees of SPTpol data [PDF]
Physical 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
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Photonic Integrated Circuits for Microwave Astronomy
Inventions, 2023 One of the main objectives of cosmology is the measurement of the Cosmic Microwave Background (CMB) polarization and, in particular, the so-called B-modes, which could demonstrate the existence of the primordial gravitational waves generated at the early
Guillermo Pascual-Cisneros +2 more
doaj +1 more source
Room for New Physics in the Rayleigh-Jeans Tail of the Cosmic Microwave Background. [PDF]
Physical 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
Stringent Limit on Primordial Magnetic Fields from the Cosmic Microwave Background Radiation. [PDF]
Physical 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
Cosmic birefringence fluctuations and cosmic microwave background B-mode polarization
Physics Letters B, 2015 Recently, BICEP2 measurements of the cosmic microwave background (CMB) B-mode polarization has indicated the presence of primordial gravitational waves at degree angular scales, inferring the tensor-to-scalar ratio of r=0.2 and a running scalar spectral ...
Seokcheon Lee, Guo-Chin Liu, Kin-Wang Ng
doaj +1 more source
Clustering of hotspots in the cosmic microwave background [PDF]
EPJ Web of Conferences, 2019 The physics behind the origin and composition of the Cosmic Microwave Background (CMB) is a well-established topic in the field of Cosmology. Literature on CMB anisotropies reveal consistency with Gaussianity [1], but these were conducted on full multi ...
Low En Zuo Joel, Yang Abel
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CMB anomalies and the effects of local features of the inflaton potential
European Physical Journal C: Particles and Fields, 2017 Recent analysis of the WMAP and Planck data have shown the presence of a dip and a bump in the spectrum of primordial perturbations at the scales $$k=0.002$$ k = 0.002 Mpc $${}^{-1}$$ - 1 and $$k=0.0035$$ k = 0.0035 Mpc $${}^{-1}$$ - 1 , respectively. We
Alexander Gallego Cadavid +2 more
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Running and Running of the Running of the Scalar Spectral Index in Warm Inflation
Universe, 2023 The next generation of cosmological observations are expected to improve the measurements of several quantities connected to the primordial inflation in the early Universe.
Suratna Das, Rudnei O. Ramos
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Using the Full Power of the Cosmic Microwave Background to Probe Axion Dark Matter [PDF]
, 2017 The cosmic microwave background (CMB) places strong constraints on models of dark matter (DM) that deviate from standard cold DM (CDM), and on initial conditions beyond the scalar adiabatic mode.
R. Hložek, D. Marsh, D. Grin
semanticscholar +1 more source
Mosaicking with cosmic microwave background interferometers [PDF]
, 2006 Measurements of cosmic microwave background (CMB) anisotropies by interferometers offer several advantages over single-dish observations. The formalism for analyzing interferometer CMB data is well developed in the flat-sky approximation, valid for small
Cornwell T. J. +8 more
core +3 more sources