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Changes in abundance and composition of a Caribbean coral reef zooplankton community after 25 years
(Universidad de Costa Rica, 2016)
First stars XIV. Sulfur abundances in extremely metal-poor stars
(EDP SCIENCES S A, 2011)
Context. Precise S abundances are important in the study of the early chemical evolution of the Galaxy. In particular the site of the formation remains uncertain because, at low metallicity, the trend of this alpha-element ...
Zooplankton abundance variability in Magdalena Bay, Baja California Sur, Mexico (1997-2001)
(Latin American Journal of Aquatic Research, 2010)
Zooplankton ware studied from 16 oceanographic surveys carried out in Magdalena Bay, Baja California Sur, Mexico, between August 1997 and March 2001. Twenty-six taxonomic groups were identified, the most abundant and ...
Diaspore abundance promotes more interaction with ants in a Brazilian atlantic forest
(2020-01-01)
The influence of Guarea guidonia (L.) Sleumer diaspore abundance on ants' preference was studied in a secondary tropical forest area in Brazil. We offered seeds in stations with different abundances (one, two, five or 10 ...
Beryllium abundances along the evolutionary sequence of the open cluster IC 4651-A new test for hydrodynamical stellar models
(EDP SCIENCES S A, 2010)
Context. Previous analyses of lithium abundances in main sequence and red giant stars have revealed the action of mixing mechanisms other than convection in stellar interiors. Beryllium abundances in stars with Li abundance ...
OXYGEN ABUNDANCES IN LOW- AND HIGH-alpha FIELD HALO STARS AND THE DISCOVERY OF TWO FIELD STARS BORN IN GLOBULAR CLUSTERS
(IOP PUBLISHING LTDBRISTOL, 2012)
Oxygen abundances of 67 dwarf stars in the metallicity range -1.6 < [Fe/H] < -0.4 are derived from a non-LTE analysis of the 777 nm O I triplet lines. These stars have precise atmospheric parameters measured by Nissen ...
Abundances in the Herbig Ae star HD 101412. Abundance anomalies; λ Boo-Vega characteristics?
(Edp Sciences, 2010-11)
Context. Recent attention has been directed to abundance variations among very young stars.
Aims. We perform a detailed abundance study of the Herbig Ae star HD 101412, taking advantage of its unusually sharp spectral ...
Chemical abundances of Seyfert 2 AGNs, III : reducing the oxygen abundance discrepancy
(Wiley Blackwell Publishing, Inc, 2020-08)
We investigate the discrepancy between oxygen abundance estimations for narrow-line regions of active galactic nuclei (AGNs) type Seyfert 2 derived using direct estimations of the electron temperature (Te-method) and those ...
Chemical abundances of main-sequence, turnoff, subgiant, and red giant stars from APOGEE Spectra. I. Signatures of diffusion in the open cluster M67
(IOP Publishing Ltd, 2018)
Detailed chemical abundance distributions for 14 elements are derived for eight high-probability stellar members of the solar metallicity old open cluster M67 with an age of similar to 4 Gyr. The eight stars consist of ...