Results 101 to 110 of about 948,048 (332)

An Equilibrium Model of the Galaxy Determined by Element Abundance Gradients

The Astrophysical Journal
We present a method to determine the gravitational potential of the Milky Way from measurements of the locations, velocities, and element abundances of stars in the Galactic disk.
Lawrence M. Widrow, David W. Hogg, Danny Horta, Haochaun Li, Adrian M. Price-Whelan   +4 more
doaj   +1 more source

The Oxygen Abundance of Nearby Galaxies from Sloan Digital Sky Survey Spectra

, 2007
We have derived the oxygen abundance for a sample of nearby galaxies in the Data Release 5 of the Sloan Digital Sky Survey (SDSS) which possess at least two independent spectra of one or several HII regions with a detected [OIII]4363 auroral line. Since,
Campbell A., Edmunds M. G., Kinkel U., Leonid S. Pilyugin, Luridiana V., Pagel B. E. J., Pagel B. E. J., Pagel B. E. J., Pilyugin L. S., Pilyugin L. S., Trinh X. Thuan   +10 more
core   +1 more source

He abundances in disc galaxies. I. Predictions from cosmological chemodynamical simulations [PDF]

, 2019
Accepted for publication in A&AWe investigate how the stellar and gas-phase He abundances evolve as a function of time within simulated star-forming disc galaxies with different star formation histories.
Kobayashi, Chiaki, Mackereth, J. Ted, Miglio, Andrea, Montalban, Josefina, Vincenzo, Fiorenzo   +4 more
core   +5 more sources

Patterns of wild meat and other protein consumption in the periphery of Salonga National Park, Democratic Republic of the Congo

People and Nature, EarlyView.
Abstract In Central Africa, human activities are severely impacting terrestrial and aquatic wildlife, threatening the food security of millions of people. Accordingly, sustainable use of wildlife is crucial for the nutrition and livelihoods of many rural communities in the region.
Zolo Admettons, Mattia Bessone, Josué Ausse Baraka, Josué Engombe Botomia, Espérance Miezi, Bénédicte Nsilu, Jonathan Nkamisha Mukole, Michel Opelele Omeno, Jean Semeki Ngabinzeke, Barbara Fruth   +9 more
wiley   +1 more source

The Gas-phase Mass–Metallicity Relation for Massive Galaxies at z ∼ 0.7 with the LEGA-C Survey

The Astrophysical Journal
The massive end of the gas-phase mass–metallicity relation (MZR) is a sensitive probe of active galactic nuclei (AGN) feedback that is a crucial but highly uncertain component of galaxy evolution models.
Zach J. Lewis, Brett H. Andrews, Rachel Bezanson, Michael Maseda, Eric F. Bell, Romeel Davé, Francesco D’Eugenio, Marijn Franx, Anna Gallazzi, Anna de Graaff, Yasha Kaushal, Angelos Nersesian, Jeffrey A. Newman, Arjen van der Wel, Po-Feng Wu   +14 more
doaj   +1 more source

Early Results from GLASS-JWST. XXI: Rapid assembly of a galaxy at z=6.23 revealed by its C/O abundance [PDF]

, 2023
Tucker Jones, Ryan L. Sanders, Yuguang Chen, Xin Wang, Takahiro Morishita, Guido Roberts-Borsani, Tommaso Treu, Alan Dressler, E. Merlin, D. Paris, P. Santini, P. Bergamini, Erin Huntzinger, Themiya Nanayakkara, Kristan Boyett, Maruša Bradač, Gabriel Brammer, Antonello Calabró, Karl Glazebrook, Kathryn Grasha, Sara Mascia, L. Pentericci, Michele Trenti, Benedetta Vulcani   +23 more
openalex   +1 more source

Abundances of Cu and Zn in metal-poor stars: Clues for Galaxy evolution [PDF]

, 2002
We present new observations of copper and zinc abundances in 90 metal-poor stars, belonging to the metallicity range −3 100). The trend of Cu and Zn abundances as a function of the metallicity (Fe/H) is discussed and compared to that of other heavy ...
T. Mishenina, V. Kovtyukh, C. Soubiran, C. Travaglio, Maurizio Busso   +4 more
semanticscholar   +1 more source

Nucleosynthesis: Stellar and Solar Abundances and Atomic Data [PDF]

, 2006
Abundance observations indicate the presence of often surprisingly large amounts of neutron capture (i.e., s- and r-process) elements in old Galactic halo and globular cluster stars.
Collier, Jason, Cowan, John J., DenHartog, E. A., Dodge, Homer L., Lawler, James E., Sneden, Christopher   +5 more
core   +4 more sources

The elemental abundance pattern in a galaxy at z = 2.626 [PDF]

Nature, 2003
The discovery of metal-poor stars (where metal is any element more massive than helium) has enabled astronomers to probe the chemical enrichment history of the Milky Way. More recently, element abundances in gas inside high-redshift galaxies has been probed through the absorption lines imprinted on the spectra of background quasars, but these have ...
Prochaska, Jason X., Howk, J. Chris, Wolfe, Arthur M.   +2 more
openaire   +3 more sources

Adsorption of Helium on Cationic or Anionic Tetracene and Pentacene

Small Structures, EarlyView.
How does the arrangement of helium atoms that are adsorbed on tetracene or pentacene ions change with increasing coverage? When does the adsorption layer change from 1D to 2D, and to 3D? Is the transition abrupt? Are the helium atoms localized? Is the arrangement the same for cations and anions? What changes as the acene grows in length?
Miriam Kappe, Florent Calvo, Rasif William, Bilal Rasul, Masoomeh Mahmoodi‐Darian, Paul Scheier, Olof Echt   +6 more
wiley   +1 more source