Results 61 to 70 of about 441,564 (317)

On the (Higher Multipoles) Variance Asymmetry in the Cosmic Microwave Background

The Astrophysical Journal
We have studied the cosmic microwave background (CMB) map looking for features beyond cosmological isotropy. We began by tiling the CMB variance maps (which are produced by different smoothing scales) with stripes of different sizes along the most ...
MohammadHossein Jamshidi, Abdolali Banihashemi, Nima Khosravi   +2 more
doaj   +1 more source

Lower Bound on the Cosmic TeV Gamma-ray Background Radiation [PDF]

, 2015
The Fermi gamma-ray space telescope has revolutionized our understanding of the cosmic gamma-ray background radiation in the GeV band. However, investigation on the cosmic TeV gamma-ray background radiation still remains sparse. Here, we report the lower bound on the cosmic TeV gamma-ray background spectrum placed by the cumulative flux of individual ...
arxiv   +1 more source

Are topological defects responsible for the 300 EeV cosmic rays? [PDF]

, 1996
We use of a hybrid matrix--Monte Carlo method to simulate the cascade through the cosmic background radiation initiated by UHE particles and radiation emitted by topological defects.
Johnson, P. A., Protheroe, R. J.
core   +2 more sources

Scintillation Response of 0D Cs3Cu2I5 Thin Layers to Light‐ and Heavy‐Ion Irradiation

Advanced Photonics Research, EarlyView.
Driven by increasing interest in uncovering the remarkable photoluminescence quantum yield of Cs3Cu2I5, polycrystalline thin layers are synthesized to investigate its radioluminescence response to energetic ions. Its spectroscopic capability is assessed in a wide range of ion mass and internal excitation processes are explored.
Mátyás Hunyadi, Attila Csík, Cintia Hajdu, Csaba Janáky, István Rajta, Gergely F. Samu, Lóránt Csige   +6 more
wiley   +1 more source

A Measurement of Atmospheric Circular Polarization with POLARBEAR

The Astrophysical Journal
At millimeter wavelengths, the atmospheric emission is circularly polarized owing to the Zeeman splitting of molecular oxygen by the Earth's magnetic field.
Takuro Fujino, Satoru Takakura, Shahed Shayan Arani, Darcy Barron, Carlo Baccigalupi, Yuji Chinone, Josquin Errard, Giulio Fabbian, Chang Feng, Nils W. Halverson, Masaya Hasegawa, Masashi Hazumi, Oliver Jeong, Daisuke Kaneko, Brian Keating, Akito Kusaka, Adrian Lee, Tomotake Matsumura, Lucio Piccirillo, Christian L. Reichardt, Kana Sakaguri, Praween Siritanasak, Kyohei Yamada   +22 more
doaj   +1 more source

Estimation of the Full-sky Power Spectrum between Intermediate and Large Angular Scales from Partial-sky CMB Anisotropies Using an Artificial Neural Network

The Astrophysical Journal, 2023
Reliable extraction of cosmological information from observed cosmic microwave background (CMB) maps may require removal of strongly foreground-contaminated regions from the analysis. In this paper, we employ an artificial neural network (ANN) to predict
Srikanta Pal, Pallav Chanda, Rajib Saha
doaj   +1 more source

The Cosmic Microwave Background [PDF]

AnnalesHenriPoincare4:S275-S290,2003, 2002
I review the discovery of the temperature fluctuations in the cosmic microwave background radiation. The underlying theory and the implications for cosmology are reviewed, and I describe the prospects for future progress.
arxiv   +1 more source

Quantum to Classical Transition from the Cosmic Background Radiation [PDF]

, 2000
We have revisited the Ghirardi-Rimini-Weber-Pearle (GRWP) approach for continuous dynamical evolution of the state vector for a macroscopic object. Our main concern is to recover the decoupling of the state vector dynamics for the center-of-mass (CM) and
A. Isar, A. O. Caldeira, A. O. Caldeira, C. Cohen-Tannoudji, C. M. Caves, E. Joos, E. P. Wigner, G. C. Ghirardi, G. C. Ghirardi, G. C. Ghirardi, G. J. Milburn, G. Lindblad, J. Mather, J. von Neumann, K. Blum, L. Diosi, M. C. de Oliveira, M. H. Y. Moussa, M. H. Y. Moussa, M. O. Scully, M. S. Turner, N. G. Almeida, N. Gisin, P. Grigolini, P. Pearle, P. Pearle, S. S. Mizrahi, V. B. Braginsky, W. G. Unruh, W. H. Zurek, W. H. Zurek, W. H. Zurek   +31 more
core   +2 more sources

Swarm‐Optimized ZnO/CdS/CIGS/GaAs Solar Cell for Enhanced Efficiency and Thermal Resilience

Advanced Energy and Sustainability Research, EarlyView.
This article addresses the problem of optimizing the efficiency and thermal resilience of ZnO/CdS/CIGS solar cells, which are promising but still face challenges in maximizing performance under high‐temperature conditions and concentrated sunlight. The main issue is enhancing the efficiency of these cells while also ensuring that they can withstand the
Habib Ullah Manzoor, Tareq Manzoor, Sajjad Hussain, Muhammad Nasir Manzoor, Ahmed Zoha   +4 more
wiley   +1 more source

Probing the Global 21 cm Background by Velocity-induced Dipole and Quadrupole Anisotropies

The Astrophysical Journal
The motion of an observer in the rest frame of the cosmic 21 cm background induces an anisotropy in the observed background, even when the background is isotropic.
Selim C. Hotinli, Kyungjin Ahn
doaj   +1 more source