Results 131 to 140 of about 271,788 (231)
Abundances in Damped Lyα Galaxies [PDF]
, 2006 Damped Lyα galaxies provide a sample of young galaxies where chemical abundances can be derived throughout the whole universe with an accuracy comparable to that for the local universe. Despite a large spread in redshift, HI column density and metallicity, DLA galaxies show a remarkable uniformity in the elemental ratios rather suggestive of similar ...
openaire +1 more source
Beryllium and Boron abundances in population II stars [PDF]
, 1995 The scientific focus of this program was to undertake UV spectroscopic abundance analyses of extremely metal poor stars with attention to determining abundances of light elements such as beryllium and boron.
core
On the Abundances of Li, Be and O in Metal-Poor Stars in the Galaxy
, 2005 Stellar atmospheres constitute excellent environments to study the chemical evolution of our Galaxy. The chemical composition of these atmospheres reflects the composition of the gas from where these stars were born.
García Pérez, Ana Elia
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The Astrophysical JournalUnderstanding the chemical enrichment of different elements is crucial to gaining a complete picture of galaxy chemical evolution. In this study, we present a new sample of 46 low-redshift, low-mass star-forming galaxies at M _* ∼ 10 ^8−10 M _⊙ along ...
Zhuyun Zhuang +8 more
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The Astrophysical JournalScandium, titanium, and vanadium can be synthesized primarily in massive stars. Yet many of the current Galactic chemical evolution (GCE) models underproduce these elements at early epochs.
Soonchul Choi +3 more
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The Vertical Metallicity Gradient of the Galactic Disk for Mono-age Stellar Populations in LAMOST
The Astrophysical JournalThe vertical metallicity gradient of the Galactic disk offers valuable insights into the disk’s formation and chemical evolution over time. We utilized the Large Sky Area Multi-Object Fibre Spectroscopic Telescope low-resolution spectral young stellar ...
Gaohuan Long +5 more
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, 2016 <p>HUMAnN2 is a pipeline to profile the presence/absence and abundance of microbial pathways in community of microbiota sequencing data. One output is a file with UniRef50 gene family abundances.
Bérénice Batut
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Under Pressure: Decoding the Effect of High Densities on Derived Nebular Properties
The Astrophysical JournalRecent JWST observations have uncovered a population of compact, high-redshift ( z > 6) galaxies exhibiting extreme nebular conditions and enhanced nitrogen abundances that challenge standard chemical evolution paradigms.
Zorayda Martinez +8 more
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XMM Observations of Metal Abundances in Galaxy Clusters
Acta Polytechnica, 2011 The hot gas that fills the space between galaxies in clusters is rich in metals. Due to their large potential well, galaxy clusters accumulate metals over the whole history of the cluster, and retain important information on cluster formation and ...
L. Lovisari, S. Schindler, W. Kapferer
doaj
Radial velocity and atmospheric parameter calculations for the GaiaNIR spectrograph
Astronomy & AstrophysicsContext. The upcoming GaiaNIR mission is currently planning to add a near-infrared spectrograph to its payload in order to enhance its scientific return, particularly for mapping the dust-obscured regions of the Milky Way. Aims.
Mészáros Szabolcs +10 more
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