Results 141 to 150 of about 25,535 (312)
Exploring X-Ray Properties of Low-metallicity Dwarf Galaxies
The Astrophysical JournalOne of the primary outstanding questions in extragalactic astronomy is the formation and early evolution of the supermassive black holes that are seen in nearly every massive galaxy.
Jenna M. Cann +5 more
doaj +1 more source
Advanced Engineering Materials, EarlyView.This study applies machine learning regression to predict chromium layer thickness in decorative trivalent chromium electroplating, using 441 experiments from laboratory‐scale (1L) and pilot‐scale (14L) setups. Tree‐based models, particularly CatBoost, outperformed linear regression by capturing nonlinear parameter interactions (R2$R^2$ up to 0.77 ...
Christoph Baumer +4 more
wiley +1 more source
Metallicity estimates with SDSS-DR6
, 2020 We present a study of the metallicity of 20268 galaxies from the Sloan Digital Sky Survey -Data Release 6 (SDSS-DR6) using the R 23 method, and derive analytical calibrations from several metallicity-sensitive line ratios: [ performed the study for the ...
J Cepa +7 more
core
Metallicity determination of M dwarfs
, 2016 Context. Several new techniques to determine the metallicity of M dwarfs with better precision have been developed over the last decades. However, most of these studies were based on empirical methods.
Heiter, Ulrike, +5 more
core +1 more source
Comparison of Triply Periodic Minimal Surface Energy Absorbers Under Uniaxial Compressive Loading
Advanced Engineering Materials, EarlyView.This study investigates LCD 3D printed Triply Periodic Minimal Surface (TPMS) structures as mechanical energy absorbers. By comparing various base designs and layered combinations under uniaxial compression, it identifies that a Diamond‐Gyroid sandwich structure offers superior performance.
Sergej Grednev +2 more
wiley +1 more source
The Metallicity Evolution of Interacting Galaxies
, 2019 Nuclear inflows of metal-poor interstellar gas triggered by galaxy interactions can account for the systematically lower central oxygen abundances observed in local interacting galaxies.
Torrey, Paul +3 more
core +1 more source
The Astrophysical JournalThe metal enrichment of a galaxy is determined by the cycle of baryons in outflows, inflows, and star formation. The relative contribution and timescale of each process sets the relationship between stellar mass, metallicity, and the star formation rate (
Nathalie A. Korhonen Cuestas +6 more
doaj +1 more source
Advanced Engineering Materials, EarlyView.Molecular dynamics is used to investigate structure refinement during severe plastic deformation. The results show similitude with experimental data. Molecular dynamics simulations of severe plastic deformation of monocrystalline and polycrystalline samples by multiaxial compression of aluminum are carried out.
Roberto B. Figueiredo
wiley +1 more source
Metallicity gradients in dwarf elliptical galaxies
, 2010 We discuss the relations between the metallicity gradients and the other characteristics of a set of dwarf elliptical galaxies in different environments.
De Rijcke, Sven +3 more
core +1 more source
Theoretical Diagnostics for Narrow-line Regions of Active Galactic Nuclei
The Astrophysical JournalGas metallicity, ionization parameter, and gas pressure can affect the observed ratios of specific strong emission lines within galaxies. While the theoretical strong lines diagnostics for gas metallicity, ionization parameters, and gas pressure in star ...
Peixin Zhu +2 more
doaj +1 more source