Results 41 to 50 of about 49,997 (277)
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
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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
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Heating of the intergalactic medium by the cosmic microwave background during cosmic dawn [PDF]
Physical Review D, 2018 The intergalactic medium is expected to be at its coldest point before the formation of the first stars in the universe. Motivated by recent results from the EDGES experiment, we revisit the standard calculation of the kinetic temperature of the neutral ...
T. Venumadhav +3 more
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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
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Probing decoupling in dark sectors with the cosmic microwave background [PDF]
Journal of Cosmology and Astroparticle Physics, 2018 The acoustic peaks in the angular power spectrum of cosmic microwave background (CMB) temperature and polarization anisotropies play an important role as a probe of the nature of new relativistic particles contributing to the radiation density in the ...
Gongjun Choi +2 more
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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
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General constraints on dark matter decay from the cosmic microwave background [PDF]
, 2016 Precise measurements of the temperature and polarization anisotropies of the cosmic microwave background can be used to constrain the annihilation and decay of dark matter. In this work, we demonstrate via principal component analysis that the imprint of
T. Slatyer, Chih-Liang Wu
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Polarization in the cosmic microwave background [PDF]
Brazilian Journal of Physics, 2006 Cosmic microwave background (CMB) studies underpin our understanding of the universe and its history. Until recently, we have relied principally on CMB temperature observations to build our standard cosmological model, but today the field forges ahead into its next frontier - CMB polarization anistropy.
openaire +5 more sources
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
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Microwave background temperature at a redshift of 6.34 from H2O absorption [PDF]
Nature, 2022 Distortions of the observed cosmic microwave background provide a direct measurement of the microwave background temperature at redshifts from 0 to 1 (refs. 1,2).
D. Riechers +6 more
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