Results 51 to 60 of about 51,105 (273)
Cosmic microwave background constraints on coupled dark matter
Physics Letters B, 2015 We study CMB constraints on a scenario where a fraction of dark matter is non-minimally coupled to a massless scalar field and dark energy is in the form of a cosmological constant.
Sophie C.F. Morris, Anne M. Green
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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
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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
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Recovering Cosmic Microwave Background Polarization Signals with Machine Learning
The Astrophysical Journal, 2023 Primordial B-mode detection is one of the main goals of current and future cosmic microwave background (CMB) experiments. However, the weak B-mode signal is overshadowed by several Galactic polarized emissions, such as thermal dust emission and ...
Ye-Peng Yan +3 more
doaj +1 more source
Advanced Science, EarlyView.This study demonstrates that BNNT exposure disrupts lipid homeostasis in bronchial epithelial cell cultures and activates eicosanoid lipid biosynthesis, producing inflammatory lipid mediators like leukotrienes. These effects are more pronounced in asthmatic cell cultures compared to healthy ones.
Govind Gupta +14 more
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Cosmic Strings and Their Induced Non-Gaussianities in the Cosmic Microwave Background
Advances in Astronomy, 2010 Motivated by the fact that cosmological perturbations of inflationary quantum origin were born Gaussian, the search for non-Gaussianities in the cosmic microwave background (CMB) anisotropies is considered as the privileged probe of nonlinear physics in ...
Christophe Ringeval
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Primordial circular polarization in the cosmic microwave background
Physics Letters B, 2019 Circular (“V-mode”) polarization is expected to be vanishing in the CMB, since it is not produced in Thomson scattering. However, considering that the conventional CMB anisotropies are generated via an early universe mechanism such as inflation or a ...
Stephon Alexander, Evan McDonough
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Hybrid loop quantum cosmology and predictions for the cosmic microwave background [PDF]
, 2017 We investigate the consequences of the hybrid quantization approach for primordial perturbations in loop quantum cosmology, obtaining predictions for the cosmic microwave background and comparing them with data collected by the Planck mission.
Laura Castell'o Gomar +3 more
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Cosmic microwave background polarization
Journal of Physics: Conference Series, 2006 Cosmic microwave background (CMB) anisotropy is our richest source of cosmological information; the standard cosmological model was largely established thanks to study of the temperature anisotropies. By the end of the decade, the Planck satellite will close this important chapter and move us deeper into the new frontier of polarization measurements ...
openaire +2 more sources
Logarithmic and Strong Coupling Models in Weyl‐Type f(Q,T)$f(Q,T)$ Gravity
Annalen der Physik, Volume 538, Issue 1, January 2026.This work explores Weyl‐type f(Q,T) gravity using recent observational datasets — CC, Pantheon+, Union 3.0, and DESI DR2. Through MCMC analysis of logarithmic and strong coupling models, the study reveals a transition from deceleration to acceleration, quintessence‐to‐phantom dynamics, and late‐time consistency with LCDM, offering a geometry‐driven ...
Rahul Bhagat, S. K. Tripathy, B. Mishra
wiley +1 more source