Results 41 to 50 of about 926 (266)
A pristine, star-forming complex at z = 4.19★
Astronomy & AstrophysicsWe report the discovery of a faint (M1700 ≃ −12.2), oxygen-deficient, strongly lensed ionizing source – dubbed Lensed And Pristine 2 (LAP2) – at a spectroscopic redshift of z = 4.19. LAP2 appears to be isolated and lies very close to the caustic produced
Vanzella E. +16 more
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Universe, 2020 Modern multimessenger astronomy delivers unique opportunity for performing crucial observations that allow for testing the physics of the gravitational interaction.
Yurij Baryshev
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Three‐dimensional Antimony Sulfide Based Flat Optics
Advanced Functional Materials, EarlyView.This work presents the development of a grayscale electron beam lithography (g‐EBL) method for fabricating antimony trisulfide (Sb2S3) nanostructures with customizable 3D profiles. The refractive index of g‐EBL patterned Sb2S3 is determined based on the synergy of genetic algorithm and transfer matrix method.
Wei Wang +18 more
wiley +1 more source
Spectrally Tunable 2D Material‐Based Infrared Photodetectors for Intelligent Optoelectronics
Advanced Functional Materials, EarlyView.Intelligent optoelectronics through spectral engineering of 2D material‐based infrared photodetectors. Abstract The evolution of intelligent optoelectronic systems is driven by artificial intelligence (AI). However, their practical realization hinges on the ability to dynamically capture and process optical signals across a broad infrared (IR) spectrum.
Junheon Ha +18 more
wiley +1 more source
CGM2 + CASBaH: The Mass Dependence of H i Lyα–Galaxy Clustering and the Extent of the CGM
The Astrophysical Journal, 2023 We combine data sets from the CGM ^2 and CASBaH surveys to model a transition point, R _cross , between circumgalactic and intergalactic media (CGM and IGM, respectively).
Matthew C. Wilde +11 more
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Redshift-Distance Survey of Early-Type Galaxies. I. Sample Selection, Properties, and Completeness [PDF]
The Astronomical Journal, 2000 43 pages, 15 figures, submitted to the Astronomical ...
da Costa, L. N. +7 more
openaire +2 more sources
Advanced Functional Materials, EarlyView.Lead halide perovskite nanocrystals are promising scintillators but suffer from reabsorption losses and limited compatibility with high‐Z additives. Hybridization of CsPbBr3 nanocrystals with PbBr2‐passivated HfO2 nanoparticle sensitizers, achieved during or after synthesis, produces stable composites with maintained optical quality, improved ...
Francesco Bruni +17 more
wiley +1 more source
مجلة بغداد للعلوم, 2009 This paper including a gravitational lens time delays study for a general family of lensing potentials, the popular singular isothermal elliptical potential (SIEP), and singular isothermal elliptical density distribution (SIED) but allows general angular
Baghdad Science Journal
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, 2018 LSST will supply up to $10^6$ supernovae (SNe) to constrain dark energy through the distance-redshift ($D_L$-$z$) test. Obtaining spectroscopic SN redshifts (spec-$z$s) is unfeasible; alternatives are suboptimal and may be biased. We propose a powerful multi-tracer generalization of the Alcock-Paczynski test that pairs redshift-free distance tracers ...
Mukherjee, Suvodip, Wandelt, Benjamin D.
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On the cosmological distance and redshift between any two objects [PDF]
Monthly Notices of the Royal Astronomical Society, 2000 We discuss the problem of how to calculate the distance between two cosmological objects given their redshifts and angular separation on the sky. Although of a fundamental nature, this problem and its solution seem to lack a detailed description in the literature. We present a new variant of its solution and quantitatively assess the most commonly used
openaire +2 more sources