Results 61 to 70 of about 120,003 (344)
Model-independent constraints on dark energy evolution from low-redshift observations [PDF]
Monthly notices of the Royal Astronomical Society, 2018 Knowing the late time evolution of the Universe and finding out the causes for this evolution are the important challenges of modern cosmology. In this work, we adopt a model-independent cosmographic approach and approximate the Hubble parameter ...
S. Capozziello +2 more
semanticscholar +1 more source
Advanced Functional Materials, EarlyView.Hollow poly(heptazine imide) spheres are prepared through a novel approach that integrates hard templating with ionothermal synthesis. This method enables precise control over surface area, pore volume, hydrophilicity, light absorption, band position, and metal composition. These tunable properties facilitate the customized design of semiconductors for
Lingli Ni +10 more
wiley +1 more source
О красном смещении спектров галактик [PDF]
Философия и космология, 2015 It is observed the spherical model of the Metagalaxy (Metagalaxy here is the observed part of the Universe) with the observer in the center of the sphere.
Избрехт А. Р.
doaj
On the Anticorrelation between Duration and Redshift in Gamma-Ray Bursts
The Astrophysical Journal, 2023 For gamma-ray bursts (GRBs) with durations greater than two seconds (so-called long GRBs), the intrinsic prompt gamma-ray emission appears, on average, to last longer for bursts at lower redshifts.
Nicole Lloyd-Ronning +6 more
doaj +1 more source
Advanced Functional Materials, EarlyView.This study investigates H4TBAPy‐based metal–organic frameworks (MOFs) ‐ NU‐1000, NU‐901, SrTBAPy, and BaTBAPy ‐ for multiphoton absorption (MPA) performance. It observes topology‐dependent variations in the 2PA cross‐section, with BaTBAPy exhibiting the highest activity.
Simon N. Deger +10 more
wiley +1 more source
Comparative study on zinc oxide nanocrystals synthesized by two precipitation methods
CerâmicaZinc oxide nanocrystals were synthesized by two precipitation methods successfully. The nanocrystals prepared via method I (zinc acetate dihydrate precipitation with KOH) were smaller in crystallite size (~20 nm) as compared to method II (zinc nitrate ...
M. R. Bodke, Y. Purushotham, B. N. Dole
doaj +1 more source
Metals at High Redshifts [PDF]
Proceedings of the International Astronomical Union, 2001 The amount of metals present in the Universe and its cosmological evolution is a key issue for our understanding of how star formation proceeds from the collapse of the first objects to the formation of present day galaxies. We discuss here recent results at the two extremes of the density scale.1.
openaire +2 more sources
Infrared resummation for biased tracers in redshift space [PDF]
Journal of Cosmology and Astroparticle Physics, 2018 We incorporate the effects of redshift space distortions and non-linear bias in time-sliced perturbation theory (TSPT). This is done via a new method that allows to map cosmological correlation functions from real to redshift space.
M. Ivanov, S. Sibiryakov
semanticscholar +1 more source
Advanced Functional Materials, EarlyView.A reproducible synthesis to control 3D/0D phase ratios via water‐tuned solvent–antisolvent methods is presented. Enhanced scintillation yield and ultrafast decay are achieved. Defect‐driven emission mechanisms are revealed through cathodoluminescence and radioluminescence, shedding light on the underexplored role of the 0D Cs4PbBr6 and mixed 0D/3D ...
Mario Calora +18 more
wiley +1 more source
Cool Gas in High-Redshift Galaxies [PDF]
, 2013 Over the past decade, observations of the cool interstellar medium (ISM) in distant galaxies via molecular and atomic fine structure line (FSL) emission have gone from a curious look into a few extreme, rare objects to a mainstream tool for studying ...
C. Carilli, F. Walter
semanticscholar +1 more source