Results 91 to 100 of about 699,213 (384)

CO Emission, Molecular Gas, and Metallicity in Main-sequence Star-forming Galaxies at z ∼ 2.3

The Astrophysical Journal, 2023
We present observations of CO(3−2) in 13 main-sequence z = 2.0–2.5 star-forming galaxies at $\mathrm{log}({M}_{* }/{M}_{\odot })=10.2\mbox{--}10.6$ that span a wide range in metallicity (O/H) based on rest-optical spectroscopy. We find that ${L}_{\mathrm{
Ryan L. Sanders, Alice E. Shapley, Tucker Jones, Irene Shivaei, Gergö Popping, Naveen A. Reddy, Romeel Davé, Sedona H. Price, Bahram Mobasher, Mariska Kriek, Alison L. Coil, Brian Siana   +11 more
doaj   +1 more source

Gas metallicity diagnostics in star-forming galaxies

, 2006
Generally the gas metallicity in distant galaxies can only be inferred by using a few prominent emission lines. Various theoretical models have been used to predict the relationship between emission line fluxes and metallicity, suggesting that some line ...
A. Marconi, Abazajian, Abazajian, Adelman-McCarthy, Allende Prieto, Alloin, Alvensleben, Bresolin, Brinchmann, Bruzual, Cardelli, Castellanos, Charlot, Denicoló, Edmunds, Ferland, Ferland, Fioc, Guseva, Guseva, Guseva, Guseva, Izotov, Izotov, Izotov, Izotov, Izotov, Izotov, Izotov, Kauffmann, Kauffmann, Kennicutt, Kennicutt, Kennicutt, Kewley, Kewley, Kobulnicky, Kobulnicky, Lamareille, Lee, Lee, Lee, Leitherer, Liang, Maier, Maier, McCall, McGaugh, Melbourne, Miller, Nagao, Nagao, Pagel, Pagel, Papaderos, Peimbert, Pettini, Pettini, Pilyugin, Posselt, R. Maiolino, Rola, Shi, Stasinska, Strauss, Sutherland, Swinbank, T. Nagao, Teplitz, Teplitz, Thuan, Tremonti, Vílchez, Zaritsky   +73 more
core   +1 more source

A Possible Solution for the $M/L-\mathrm{[Fe/H]}$ Relation of Globular Clusters in M31. II. the Age-Metallicity Relation [PDF]

, 2017
This is the second of a series of papers in which we present a new solution to reconcile the prediction of single stellar population (SSP) models with the observed stellar mass-to-light ($M/L$) ratios of globular clusters (GCs) in M31 and its trend with ...
Haghi, Hosein, Khalaj, Pouria, Kroupa, Pavel, Zonoozi, Akram Hasani   +3 more
core   +2 more sources

THE UNIVERSAL STELLAR MASS–STELLAR METALLICITY RELATION FOR DWARF GALAXIES [PDF]

, 2013
We present spectroscopic metallicities of individual stars in seven gas-rich dwarf irregular galaxies (dIrrs), and we show that dIrrs obey the same mass–metallicity relation as the dwarf spheroidal (dSph) satellites of both the Milky Way and M31: .
E. Kirby, J. Cohen, P. Guhathakurta, L. Cheng, J. Bullock, A. Gallazzi   +5 more
semanticscholar   +1 more source

X‐Ray Tomography Analysis of Damage Mechanisms in Metal Matrix Syntactic Foams During Compression

Advanced Engineering Materials, EarlyView.
In situ synchrotron X‐ray tomography is used to investigate the internal damage mechanisms of AlSi12 metal matrix syntactic foam with ceramic hollow spheres during compressive loading. It is concluded that a homogeneous distribution of the second‐phase filler material results in a sequential collapse in a localized region; this leads to controlled and ...
Indrajeet Tambe, János Endre Maróti, Imre Norbert Orbulov, Zoltan Hegedűs, Markus Ziehmer, Carl E. Krill III, Håkan Hallberg, Pär A. T. Olsson, Johan Hektor   +8 more
wiley   +1 more source

Does Metallicity Affect the Protoplanetary Disk Fraction? Answers from the Outer Milky Way

The Astrophysical Journal
The role of metallicity in shaping protoplanetary disk evolution remains poorly comprehended. This study analyzes the disk fraction of 10 young (0.9–2.1 Myr) and low-metallicity (0.34–0.83 Z _⊙ ) clusters located in the outer Milky Way with ...
Sudeshna Patra, Jessy Jose, Neal J. Evans II   +2 more
doaj   +1 more source

Merging galaxies produce outliers from the Fundamental Metallicity Relation

, 2015
From a large sample of $\approx 170,000$ local SDSS galaxies, we find that the Fundamental Metallicity Relation (FMR) has an overabundance of outliers, compared to what would be expected from a Gaussian distribution of residuals, with significantly lower
Christensen, Lise, Finlator, Kristian, Grønnow, Asger   +2 more
core   +1 more source

Evidencing the existence of exciting half-metallicity in two-dimensional TiCl3 and VCl3 sheets

Scientific Reports, 2016
Half-metallicity combined with wide half-metallic gap, unique ferromagnetic character and high Curie temperature has become a key driving force to develop next-generation spintronic devices.
Yungang Zhou, Haifeng Lu, X. Zu, F. Gao
semanticscholar   +1 more source

Trace Nickel Activated Biphasic Core‐CuOii/Shell‐CuOi Secondary Microspheres Enable Room Temperature Parts‐Per‐Trillion‐Level NO2 Detection

Advanced Engineering Materials, EarlyView.
An idea of designing novel sensors is proposed by creating appropriate Schottky barriers and vacancies between isomorphous Core‐CuOii/ Shell‐CuOi secondary microspheres and enhancing catalytic and spill‐over effects, and electronegativity via spontaneous biphasic separation, self‐assembly, and trace‐Ni‐doping.
Bala Ismail Adamu, Peipei Chen, Shafia Mukhtar Ibrahim, Mukhtar Lawan Adam, Attia Falak, Mokhotjwa Simon Dhlamini, Hanfu Wang, Lingxiang Jiang, Weiguo Chu   +8 more
wiley   +1 more source

A study on the metallicity gradients in the galactic disk using open clusters

Frontiers in Astronomy and Space Sciences
We study the metallicity distribution and evolution in the galactic disk based on the largest sample of open star clusters in the galaxy. From the catalog of 1,879 open clusters in the range of galactocentric distance (RGC) from 4 to 20 kpc, we ...
Yogesh Chandra Joshi, Deepak, Sagar Malhotra   +2 more
doaj   +1 more source