Results 61 to 70 of about 277,653 (299)

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

The Cosmic Infrared Background: Measurements and Implications [PDF]

, 2001
The cosmic infrared background records much of the radiant energy released by processes of structure formation that have occurred since the decoupling of matter and radiation following the Big Bang.
Altieri B, Aussel H, Beichman CA, Bertin E, Brodd S, Burigana C, Böttcher M, Calzetti D, Clements DL, Coleman GD, Comastri A, Devriendt JEG, Devriendt JEG, Elbaz D, Eli Dwek, Fioc M, Franceschini A, Gispert R, Grupe D, Guiderdoni B, Guy J, Harwit M, Hasinger G, Hauser MG, Henry RC, Holt SS, Isobe T, Jansen RA, Juvela M, Kawara K, Lagache G, Lagache G, Lagache G, Lisenfeld U, Lutz D, Matsuhara H, Mattila K, McConnell ML, Michael G. Hauser, Milliard B, Nikishov AI, Olbers HWM, Pagel BEJ, Peebles PJE, Puget J-L, Puget J-L, Rocca-Volmerange B, Rowan-Robinson M, Sandage A, Schmidt M, Scholl MS, Sciama DW, Setti G, Severgnini P, Stickel M, Sturm E, Takeuchi TT, Taniguchi Y, Tinsley BM, Tinsley BM, Vignati P, Wright EL   +61 more
core   +2 more sources

The angular distribution of the cosmic background radiation [PDF]

Reports on Progress in Physics, 1986
AbstractCrucial cosmological information is provided by the observed angular distribution (isotropy) of the cosmic microwave background radiation. This report treats the current status of searches for anisotroples in this radiation on all angular scales from 180° (the dipole component) to 6″.
openaire   +3 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

Integrated Galaxy Light from Stacking 105 Random Pointings in the Dark Energy Survey Data

The Astrophysical Journal
We present a new technique for measuring the integrated galaxy light (IGL) with stacked image data from the Dark Energy Survey (DES). We extract 1′ × 1′ cutouts from nearly 100,000 randomly selected positions in the g, r, i, z, and Y bands from the DES ...
Jenna E. Moore, Seth H. Cohen, Philip Mauskopf, Evan Scannapieco   +3 more
doaj   +1 more source

Long range correlation in cosmic microwave background radiation

, 2011
We investigate the statistical anisotropy and Gaussianity of temperature fluctuations of Cosmic Microwave Background radiation (CMB) data from {\it Wilkinson Microwave Anisotropy Probe} survey, using the multifractal detrended fluctuation analysis ...
C. L. Alados, D. Novikov, F. Bernardeau, F. Ghasemi, H. E. Hurst, H. O. Peitgen, J. A. Peacock, J. Feder, J. M. Hausdorff, J. R. Bond, K. Schwarzschild, M. Reza Rahimi Tabar, M. Sadegh Movahed, P. Coles, R. N. Mantegna, Sohrab Rahvar, T. Fukushige, V. F. Mukhanov   +17 more
core   +1 more source

On the Contribution of Active Galactic Nuclei to the Cosmic Background Radiation [PDF]

The Astrophysical Journal, 2007
We present the results of calculations of the cosmic AGN background spectrum from 3 keV (4\times 10^{-4} microns) to 1000 microns. These computations make use of the measured X-ray luminosity function and its evolution, as well as fits from synthesis models of the cosmic X-ray background (CXB) to predict the AGN contribution to the cosmic infrared ...
David R. Ballantyne, Casey Papovich
openaire   +3 more sources

Finding the Right Synergy of Iron and Molybdenum in Mixed Metal Oxide Catalysts for the Sustainable Production of Acetaldehyde via Oxidative Dehydrogenation of Ethanol

ChemCatChem, EarlyView.
Green acetaldehyde is produced via the partial oxidation of bioethanol over highly selective iron–molybdenum mixed oxide catalysts. Tuning the iron content in the catalysts reveals key correlations between catalyst composition, structure, and reactivity.
Danny Stark, Alfons Drochner, Jonas M. Grenz, Jan Welzenbach, Hannah Lamers, Kathrin Hofmann, Martin Panthöfer, Angela Möller, Christian Hess, Marcus Rose, Bastian J. M. Etzold, Tanja Franken   +11 more
wiley   +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

A common origin of all the species of high-energy cosmic rays? [PDF]

, 1999
Cosmic ray nuclei, cosmic ray electrons with energy above a few GeV, and the diffuse gamma-ray background radiation (GBR) above a few MeV, presumed to be extragalactic, could all have their origin or residence in our galaxy and its halo.
Antoniou, Nikos, Dar, Arnon, De Rújula, A.   +2 more
core   +1 more source