Results 51 to 60 of about 6,884 (245)

Forecast of Foreground Cleaning Strategies for AliCPT-1

The Astrophysical Journal Supplement Series
We report the test results of several independent foreground cleaning pipelines used in the Ali CMB Polarization Telescope experiment (AliCPT-1), a high-altitude cosmic microwave background (CMB) imager in the Northern Hemisphere with thousands of ...
Junzhou Zhang, Shamik Ghosh, Jiazheng Dou, Yang Liu, Siyu Li, Jiming Chen, Jiaxin Wang, Zhaoxuan Zhang, Jacques Delabrouille, Mathieu Remazeilles, Chang Feng, Bin Hu, Hao Liu, Larissa Santos, Pengjie Zhang, Wen Zhao, Le Zhang, Zhi-Qi Huang, Hong Li, Xinmin Zhang   +19 more
doaj   +1 more source

Cosmic Background Radiation and “ether-drift” experiments [PDF]

EPL (Europhysics Letters), 2016
`Ether-drift' experiments have played a crucial role for the origin of relativity. Though, a recent re-analysis shows that those original measurements where light was still propagating in gaseous systems, differently from the modern experiments in vacuum and in solid dielectrics, indicate a small universal anisotropy which is naturally interpreted in ...
Consoli M, PLUCHINO, ALESSANDRO, RAPISARDA, Andrea   +2 more
openaire   +4 more sources

Severity of effect considerations regarding the use of mutation as a toxicological endpoint for risk assessment: A report from the 8th International Workshop on Genotoxicity Testing (IWGT)

Environmental and Molecular Mutagenesis, EarlyView.
Abstract Exposure levels without appreciable human health risk may be determined by dividing a point of departure on a dose–response curve (e.g., benchmark dose) by a composite adjustment factor (AF). An “effect severity” AF (ESAF) is employed in some regulatory contexts.
Barbara L. Parsons, Marc A. Beal, Kerry L. Dearfield, George R. Douglas, Min Gi, B. Bhaskar Gollapudi, Robert H. Heflich, Katsuyoshi Horibata, Michelle Kenyon, Alexandra S. Long, David P. Lovell, Anthony M. Lynch, Meagan B. Myers, Stefan Pfuhler, Alisa Vespa, Andreas Zeller, George E. Johnson, Paul A. White   +17 more
wiley   +1 more source

Revisiting the A L Lensing Anomaly in Planck 2018 Temperature Data

The Astrophysical Journal
We revisit the lensing anomaly in the Planck 2018 temperature (TT) data and examine its robustness to frequency selection and additional sky masking. Our main findings are as follows.
Graeme E. Addison, Charles L. Bennett, Mark Halpern, Gary Hinshaw, Janet L. Weiland   +4 more
doaj   +1 more source

Measurement of background radiation, cosmic ray flux and their hazard parameter of Baghdad city districts

Iraqi Journal of Physics, 2019
The aim of this work was directed to measure the cosmic ray (CR) flux and the background (BG) absorbed dose rate for districts of Baghdad city. The maximum values of CR flux was 2.01 (particle/cm2.s) registered for several Baghdad districts and the ...
Shafik S. Shafik
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

Radiometer system to map the cosmic background radiation [PDF]

Review of Scientific Instruments, 1978
We have developed a 33-GHz airborne radiometer system to map large angular scale variations in the temperature of the 3 K cosmic background radiation. A ferrite circulator switches a room-temperature mixer between two antennas pointing 60° apart in the sky.
Gorenstein, Marc V., Muller, Richard A., Smoot, George F., Tyson, J. Anthony   +3 more
openaire   +5 more sources

Dating the Middle Palaeolithic of Fumane Cave by the combined ESR/U‐series method

Journal of Quaternary Science, EarlyView.
ABSTRACT Fumane Cave, located in Northern Italy, is a major prehistoric site for understanding late Neandertal and early modern human behaviours. The cave contains a 12‐m‐thick stratigraphic sequence of Middle and Upper Palaeolithic layers, which have yielded a number of flint artefacts and faunal remains.
Christophe Falguères, Giulia Gruppioni, Jean Jacques Bahain, Jean Michel Dolo, Marco Peresani   +4 more
wiley   +1 more source

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

A Cross-internal Linear Combination Approach to Probe the Secondary CMB Anisotropies: Kinematic Sunyaev–Zel’dovich Effect and CMB Lensing

The Astrophysical Journal, 2023
We propose a cross-internal linear combination (cross-ILC) approach to measure the small-scale cosmic microwave background (CMB) anisotropies robustly against the contamination from astrophysical signals.
Srinivasan Raghunathan, Yuuki Omori
doaj   +1 more source