Results 91 to 100 of about 277,653 (299)

Search for Linear Polarization of the Cosmic Background Radiation [PDF]

Physical Review Letters, 1979
We present preliminary measurements of the linear polarization of the cosmic microwave background (3 K blackbody) radiation. These ground-based measurements are made at 9-mm wavelength. We find no evidence for linear polarization, and set an upper limit for a polarized component of 0.8 mK with 95% confidence level. This implies that the present rate of
Lubin, P M, Smoot, G F
openaire   +6 more sources

Contribution of Unresolved Sources to Diffuse Gamma-Ray Emission from the Galactic Plane

The Astrophysical Journal
The diffuse gamma-ray emission from the Milky Way serves as a crucial probe for understanding the propagation and interactions of cosmic rays within our Galaxy.
Jiayin He, Houdun Zeng, Yi Zhang, Qiang Yuan, Rui Zhang, Jun Li   +5 more
doaj   +1 more source

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, Guo-Jian Wang, Si-Yu Li, Jun-Qing Xia   +3 more
doaj   +1 more source

Unification of Conformal and Fuzzy Gravities With Internal Interactions Resulting in SO(10) and a Possible Probe Through Stochastic Gravitational Wave Background

Fortschritte der Physik, EarlyView.
Abstract The unification of conformal and fuzzy gravities with internal interactions is based on the facts that i) the tangent group of a curved manifold and the manifold itself do not necessarily have the same dimensions and ii) both gravitational theories considered here have been formulated in a gauge theoretic way.
Gregory Patellis, Danai Roumelioti, Stelios Stefas, George Zoupanos   +3 more
wiley   +1 more source

CMB-S4: Iterative Internal Delensing and r Constraints

The Astrophysical Journal
The tightest constraints on the tensor-to-scalar ratio r can only be obtained after removing a substantial fraction of the lensing B -mode sample variance.
Sebastian Belkner, Julien Carron, Louis Legrand, Caterina Umiltà, Clem Pryke, Colin Bischoff, CMB-S4 Collaboration   +6 more
doaj   +1 more source

Ultra-high energy cosmic rays threshold in Randers-Finsler space

, 2008
Kinematics in Finsler space is used to study the propagation of ultra high energy cosmic rays particles through the cosmic microwave background radiation. We find that the GZK threshold is lifted dramatically in Randers-Finsler space.
Bao D, Chang Zhe, Gibbons G W, Kifune T, Kluzniak W, Kostelecky V A, Lawrence M A, Li X, Li Xin, Sato H, Takeda M, Zatsepin G T   +11 more
core   +1 more source

Measurements of the Cosmic Background Radiation [PDF]

, 1986
Maps of the large scale structure (θ>6 °) of the cosmic background radiation covering 90% of the sky are now available. The data show a very strong 50–100 σ (statistical error) dipole component, interpreted as being due to our motion, with a direction of α = 11.25 ± 0.15 hours, δ = -5.6 ± 2.0° The inferred direction of the velocity of our galaxy ...
Philip Lubin, Thyrso Villela
openaire   +2 more sources

Impacts of atmospheric river reconnaissance dropsondes on ECMWF Integrated Forecasting System precipitation forecasts

Quarterly Journal of the Royal Meteorological Society, EarlyView.
Impacts of Atmospheric River Reconnaissance dropsonde observations on precipitation forecasts over the U.S. West Coast are examined in the European Centre for Medium‐Range Weather Forecasts (ECMWF) Integrated Forecasting System (IFS), using observing‐system experiments.
Jia Wang, David A. Lavers, Luca Delle Monache, Bruce Ingleby, Minghua Zheng, Xingren Wu, Fred Martin Ralph, Florian Pappenberger   +7 more
wiley   +1 more source

Cosmological Production of Vector Bosons and Cosmic Microwave Background Radiation

, 2005
The intensive cosmological creation of vector W, Z- bosons in the cosmological model with the relative units is considered. Field theoretical models are studied, which predict that the CMB radiation and the baryon matter in the universe can be products ...
A. A. Grib, A. A. Grib, A. A. Gusev, A. A. Starobinsky, A. A. Starobinsky, A. D. Linde, A. D. Sakharov, A. M. Polyakov, B. M. Barbashov, C. Misner, D. B. Blaschke, D. Behnke, D. V. Proskurin, E. W. Kolb, H. Wentzel, H.-P. Pavel, I. V. Polubarinov, J. A. Wheeler, J. Bernstein, J. Schwinger, L. B. Okun, L. D. Faddeev, L. D. Landau, M. Fukugita, M. Pawlowski, R. Kallosh, R. Srianand, R. U. Sexl, S. I. Vinitsky, S. Schweber, S. Weinberg, V. I. Ogievetskii, V. N. Pervushin, V. N. Pervushin, V. N. Pervushin, Ya. B. Zel'dovich, Ya. B. Zel'dovich   +36 more
core   +1 more source

Low Background Radiation Detection Techniques and Mitigation of Radioactive Backgrounds

Frontiers of Physics, 2020
The study of rare fundamental physics phenomena, such as double-beta decay, rare nuclear decays and dark matter, requires very low levels of background radiation in order to observe a signal.
M. Laubenstein, I. Lawson
semanticscholar   +1 more source