Results 121 to 130 of about 52,001 (350)

Chemical evolution of star clusters

open access: yes, 2009
I discuss the chemical evolution of star clusters, with emphasis on old globular clusters, in relation to their formation histories. Globular clusters clearly formed in a complex fashion, under markedly different conditions from any younger clusters ...
Abia C.   +6 more
core   +1 more source

PN Abundances in Different Galactic Systems [PDF]

open access: yesSymposium - International Astronomical Union, 1993
Developments in the measurement of abundances in planetary nebulae since IAU Symposium 131 are reviewed. Present uncertainties and outstanding problems in the interpretation of emission-line measurements are discussed. Results for different samples of PN are reviewed, in terms of the galactic site.
openaire   +1 more source

Phosphorus‐Structured Gel Electrolytes Enable Dual Protection for Thermal Runaway‐Resistant Lithium Metal Batteries

open access: yesENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
The PD‐VI GPE synthesized via in situ γ‐ray polymerization facilitates formation of a dense F/P‐rich SEI layer, enabling stable Li deposition while suppressing interfacial side reactions. The phosphorus‐containing framework enhances separator thermal stability and effectively mitigates O2 release from cathodes, demonstrating improved safety under the ...
Zeyu Zhang   +16 more
wiley   +1 more source

NO and c-C3H2 in the Outer Galaxy: High Molecular Abundances at RGC > 13 kpc

open access: yesThe Astrophysical Journal
Observations of the J _Ka, Kc = 4 _1,4 → 3 _0,3 , 4 _0,4 → 3 _1,3 , and 2 _2,0 → 1 _1,1 rotational lines of c-C _3 H _2 and the J = 3/2 → 1/2, Ω = 1/2 transition of NO (X ^2 Π _r ) were conducted at 2 mm toward 20 Galactic edge clouds with R _GC = 10.8 ...
L. A. Koelemay, L. M. Ziurys
doaj   +1 more source

R-process and alpha-elements in the Galactic disk: Kinematic correlations

open access: yes, 2004
Recent studies of elemental abundances in the Galactic halo and in the Galactic disk have underscored the possibility to kinematically separate different Galactic subcomponents.
Grebel, E. K., Koch, Andreas
core  

Abundances in the Gaseous Galactic Halo [PDF]

open access: yesHighlights of Astronomy, 1998
AbstractThe well measured gas-phase abundances in the low halo suggest that this region of the Galaxy has total (gas plus dust) metal abundances which are close to those in the solar neighborhood. The gas-phase abundances in the halo are generally higher than those seen in the disk, however, this affect is likely due to the destruction of dust in the ...
openaire   +1 more source

Tomtit‐Raven Evolutionary Selector‐Reinforced Attention‐Driven: A High‐Performance and Computationally Efficient Cyber Threat Detection Framework for Smart Grids

open access: yesEnergy Science &Engineering, EarlyView.
Overview of the proposed work. ABSTRACT Identifying cyber threats maintains the security and operational stability of smart grid systems because they experience escalating attacks that endanger both operating data reliability and system stability and electricity grid performance.
Priya R. Karpaga   +3 more
wiley   +1 more source

X-Ray Study of Temperature and Abundance Profiles of the Cluster of Galaxies Abell 1060 with Suzaku

open access: yes, 2007
We carried out observations of the central and 20' east offset regions of the cluster of galaxies Abell 1060 with Suzaku. Spatially resolved X-ray spectral analysis has revealed temperature and abundance profiles of Abell 1060 out to 27' ~ 380; /h_70 kpc,
Fukazawa, Yasushi   +33 more
core   +1 more source

Abundance of strontium in the Galactic globular cluster 47 Tuc

open access: diamond, 2023
E. Kolomiecas   +3 more
openalex   +1 more source

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