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
doaj +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
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
doaj +1 more source
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
doaj +1 more source
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
Cosmic Microwave Background from Effective Field Theory
Universe, 2019 In this work, we study the key role of generic Effective Field Theory (EFT) framework to quantify the correlation functions in a quasi de Sitter background for an arbitrary initial choice of the quantum vacuum state. We perform the computation in unitary
Sayantan Choudhury
doaj +1 more source
Optimization of a Microwave Polarimeter for Astronomy with Optical Correlation and Detection
Sensors, 2023 Cosmic Microwave Background (CMB) B-modes detection is the main focus of future CMB experiments because of the valuable information it contains, particularly to probe the physics of the very early universe. For this reason, we have developed an optimized
Guillermo Pascual-Cisneros +2 more
doaj +1 more source
Self-Similar Symmetry Model and Cosmic Microwave Background
Frontiers in Applied Mathematics and Statistics, 2016 In this paper, we present the self-similar symmetry (SSS) model that describes the hierarchical structure of the universe. The model is based on the concept of self-similarity, which explains the symmetry of the cosmic microwave background (CMB).
Tomohide eSonoda
doaj +1 more source
A Measurement of the Cosmic Microwave Background B-mode Polarization Power Spectrum at Subdegree Scales from Two Years of polarbear Data [PDF]
, 2017 We report an improved measurement of the cosmic microwave background B-mode polarization power spectrum with the Polarbear experiment at 150 GHz. By adding new data collected during the second season of observations (2013–2014) to re-analyzed data from ...
T. C. C. P. Ade +80 more
semanticscholar +1 more source
Primordial Non-Gaussianity in the Cosmic Microwave Background
Advances in Astronomy, 2010 In the last few decades, advances in observational cosmology have given us a standard model of cosmology. We know the content of the universe to within a few percent.
Amit P. S. Yadav, Benjamin D. Wandelt
doaj +1 more source