Results 41 to 50 of about 52,001 (350)

Galactic Abundances: Report of Working Group 3 [PDF]

, 2001
We summarize the various methods and their limitations and strengths to derive galactic abundances from in-situ and remote-sensing measurements, both from ground-based observations and from instruments in space. Because galactic abundances evolve in time
Bothmer, V., Buclin, F., Christian, E. R., Cummings, A. C., Flückiger, E. O., George, J. S., Hofer, M. Y., Jones, F. C., Keller, J. W., Kirilova, D., Klecker, B., Kunow, H., Laming, M., Salerno, E., Sofia, U. J., Stone, E. C., Thielemann, F.-K., Tranquille, C., Wenzel, K.-P., Wiedenbeck, M. E.   +19 more
core   +1 more source

Nucleosynthesis of Cobalt and Copper

Galaxies
Chemical abundances of cobalt (Co; Z = 27) and copper (Cu; Z = 29) in bulge and halo stars are presented and compared with chemical evolution models.
Beatriz Barbuy, Amâncio C. S. Friaça, Heitor Ernandes   +2 more
doaj   +1 more source

Chemical Abundances in Field Red Giants from High-Resolution H-Band Spectra using the APOGEE Spectral Linelist

, 2012
High-resolution H-band spectra of five bright field K, M, and MS giants, obtained from the archives of the Kitt Peak National Observatory (KPNO) Fourier Transform Spectrometer (FTS), are analyzed to determine chemical abundances of 16 elements.
Bizyaev, Dmitry, Cunha, Katia, Holtzman, Jon, Johnson, Jennifer A., Majewski, Steven R., Meszaros, Szabolcs, Perez, Ana Garcia, Prieto, Carlos Allende, Schiavon, Ricardo, Shetrone, Matthew D., Smith, Verne V.   +10 more
core   +1 more source

Abundances of Planetary Nebulae and Evolved Stars: Iron and Sulfur Depletion, and Carbon and Nitrogen Enrichment, in Low- and Intermediate-mass Stellar Populations in the Milky Way

The Astrophysical Journal
We research the elemental abundances in Galactic planetary nebulae (PNe) compared with those of their stellar progenitors (red giant branch and asymptotic giant branch, AGB, stars), to explore and quantify the expected—i.e., due to AGB evolution or ...
Letizia Stanghellini, Verne V. Smith, Katia Cunha, Nikos Prantzos   +3 more
doaj   +1 more source

Ice Lithography: Recent Progress Opens a New Frontier of Opportunities

Advanced Functional Materials, EarlyView.
This review focuses on recent advancements in ice lithography, including breakthroughs in compatible precursors and substrates, processes and applications, hardware, and digital methods. Moreover, it offers a roadmap to uncover innovation opportunities for ice lithography in fields such as biological, nanoengineering and microsystems, biophysics and ...
Bingdong Chang, Gwendoline A. E. Anand, Rubaiyet Haque, Dylan A. Chiaro, Mona Sharma, Andrew R. Williams, Frank Niklaus, Daryl W. Yee, Gavin M. King, Anpan Han   +9 more
wiley   +1 more source

The connection between the Galactic halo and ancient Dwarf Satellites

, 2017
We explore the hypothesis that the classical and ultra-faint dwarf spheroidal satellites of the Milky Way have been the building blocks of the Galactic halo by comparing their [O/Fe] and [Ba/Fe] versus [Fe/H] patterns with the ones observed in Galactic ...
Matteucci, F., Romano, D., Spitoni, E., Vincenzo, F.   +3 more
core   +1 more source

Constraining planet structure and composition from stellar chemistry: trends in different stellar populations [PDF]

, 2017
The chemical composition of stars that have orbiting planets provides important clues about the frequency, architecture, and composition of exoplanet systems.
Adibekyan, V., Barros, S. C. C., Delgado-Mena, E., Demangeon, O., Dorn, C., Faria, J., Israelian, G., Mordasini, C., Noack, L., Santos, N. C., Sousa, S. G.   +10 more
core   +2 more sources

Multipurpose Transparent Nanocomposites for Gamma Spectroscopy, Pulse Shape Discrimination, Thermal Neutron Detection, Radiation Shielding, and High Refractive Index Applications

Advanced Functional Materials, EarlyView.
Materials exist that are useful for gamma scintillation, radiation shielding, neutron‐gamma pulse shape discrimination (PSD), thermal neutron detection, or high refractive index applications. While certain materials have exhibited optimal performance for each of these applications, none achieve multiple functions.
Isabelle Winardi, Stephane Miaule, Robert Carmichael, Bowen Sun, Ziqing Han, Prabhav Surabhi, Zhen Luo, Noelan Hum, David Prout, Yi‐An Chen, Ting‐Hsuan Wu, Hao Yu, Arion Chatziioannou, Qibing Pei   +13 more
wiley   +1 more source

Triazine‐Trione Thermosets with High Processability for Scaffold Applications in Bone Tissue Engineering

Advanced Healthcare Materials, EarlyView.
Novel photo‐clickable triazine‐trione thermosets can be shaped and cured under mild conditions, including room and physiological temperatures. These materials are biocompatible and support osteogenic differentiation of bone marrow–derived mesenchymal stem cells on their surface.
Åshild Johansen, Shuntaro Yamada, Daniel J. Hutchinson, Mohammed A. Yassin, Samih Mohamed‐Ahmed, Cecilie Gjerde, Michael Malkoch, Kamal Mustafa   +7 more
wiley   +1 more source

Fluorine Abundances in Local Stellar Populations

The Astronomical Journal
We present the first fluorine measurements in 12 normal K giants belonging to the Galactic thin and thick disks using spectra obtained with the Phoenix infrared spectrometer on the 2.1 m telescope at Kitt Peak. Abundances are determined from the (1−0) R9
K. E. Brady, C. A. Pilachowski, V. Grisoni, Z. G. Maas, K. A. Nault   +4 more
doaj   +1 more source