Results 151 to 160 of about 52,001 (350)

Metal abundances of galactic globular clusters

The Astrophysical Journal, 1984
On a mesure l'indice ΔS de l'abondance en metaux pour les etoiles RR Lyrae de neuf amas globulaires. Il y a une bonne correlation entre ΔS et l'indice de temperature de la branche des geantes (V-K) 0 GB. Les abondances ΔS de 26 amas globulaires ont ete utilisees pour re-etalonner l'indice de Zinn Q 39 en fonction de [Fe/H].
openaire   +1 more source

CdCl2 Treatment for Cu2ZnSn(S,Se)4: A Method to Enhance the Solar Cell Performance

Progress in Photovoltaics: Research and Applications, EarlyView.
We present, for the first time, two alternative CdCl2 treatments applied to solution‐processed kesterite (CZTSSe) absorbers: pre‐selenization and post‐selenization. Carrier concentration is consistently increased by either route, whereas the band gap decreases with pre‐selenization but remains nearly constant with post‐selenization; enhanced defect ...
Prabeesh Punathil, Elisa Artegiani, Solidea Zanetti, Simya O K, Luca Lozzi, A. Gasparotto, Fabio Piccinelli, C. L. Boldrini, S. Binetti, Alessandro Romeo   +9 more
wiley   +1 more source

Photoerosion and the abundances of the light elements [PDF]

The abundances of the rare light elements H-2, He-3, Li-7, and B-11 are shown to be potentially affected by photoerosion. That process, involving the interaction of high energy photons from galactic centers with atomic nuclei, will increase the ...
Boyd, Richard N., Ferland, Gary J., Schramm, David N.   +2 more
core   +1 more source

Galactic Chemical Abundances atz > 3. I. First Results from the Echellette Spectrograph and Imager [PDF]

, 2001
J. X. Prochaska, Eric Gawiser, Arthur M. Wolfe   +2 more
openalex   +1 more source

Broad‐Spectral Response Lead Halide Perovskite Solar Cells Through Integration of Multifunctional Organic Bulk‐Heterojunction and Quantum‐Cutting Downconversion Materials

Rare Metals, EarlyView.
ABSTRACT Expanding near‐infrared (NIR) spectral response and utilizing ultraviolet (UV) photons are effective strategies for enhancing the power conversion efficiency (PCE) of lead halide perovskite solar cells (PSCs). However, the range of NIR spectral response extension and the utilization of UV light for devices are not enough, and the loss of ...
Li He, Sheng Ma, Yusong Zhou, Haotian Zhang, Dezhao Zhang, Hongzhen Su, Lei Wang, Xinjun Li, Hong Liu, Wenzhong Shen   +9 more
wiley   +1 more source

The Impact of Stellar Rotation on the Nitrogen Abundance Gradient from OB Stars in the Galactic Disk [PDF]

, 2004
S. Daflon, Kátia Cunha
openalex   +1 more source

Leveraging Electrochemical Diversity in Engineering Liquid‐State Ionic Devices for Neuromorphic Computing

Small, EarlyView.
Mixed‐ion transport through Å‐scale pores exhibits various functions, including voltage activation, voltage inactivation, nanopulse generation, and synaptic behavior. Our work reveals that one of the fundamental advantages of ionic computing over electronic computingthe diversity of charge carriersdirectly translates into functional diversity in the ...
Yechan Noh, Alex Smolyanitsky
wiley   +1 more source

Extending the [C/N]–Age Calibration: Using Globular Clusters to Explore Older and Metal-poor Populations

The Astronomical Journal
In the coming years, detailed chemical abundances from large-scale high-resolution spectroscopic surveys will become available for vast numbers of stars across the Milky Way.
Taylor Spoo, Katelyn Thomas, Ellie Kaleo Toguchi-Tani, Jonah Otto, Natalie Myers, Jamie Tayar, Jessica S. Schonhut-Stasik, Matthew Shetrone, Alessa Ibrahim Wiggins, John Donor, Peter M. Frinchaboy   +10 more
doaj   +1 more source

Impact of Device Architecture on Proton Detection Efficiency in 2D Perovskite Thick Film Detectors

Small, EarlyView.
This work shows the role of device architecture in MeV proton detection with 2D perovskite thick (> 1 µm) films. A direct comparison between planar and stacked devices demonstrates that the stacked geometry achieves superior response by enabling more efficient charge collection and better exploitation of the active layer volume, ensuring stable and ...
Giulia Napolitano, Sara Cepić, Ilaria Fratelli, Massimo Chiari, Beatrice Fraboni, Laura Basiricò   +5 more
wiley   +1 more source

The APO-K2 Catalog. II. Accurate Stellar Ages for Red Giant Branch Stars across the Milky Way

The Astronomical Journal
We present stellar age determinations for 4661 red giant branch stars in the APO-K2 catalog, derived using mass estimates from K2 asteroseismology from the K2 Galactic Archaeology Program and elemental abundances from the Apache Point Galactic Evolution ...
Jack T. Warfield, Joel C. Zinn, Jessica Schonhut-Stasik, James W. Johnson, Marc H. Pinsonneault, Jennifer A. Johnson, Dennis Stello, Rachael L. Beaton, Yvonne Elsworth, Rafael A. García, Savita Mathur, Benoît Mosser, Aldo Serenelli, Jamie Tayar   +13 more
doaj   +1 more source