Abundance ratios in hierarchical galaxy formation [PDF]
Astrophysics and Space Science, 1999 7 pages, 3 figures, accepted by ...
openaire +5 more sources
Perspectives on Intracluster Enrichment and the Stellar Initial Mass Function in Elliptical Galaxies [PDF]
, 2013 Stars formed in galaxy cluster potential wells must be responsible for the high level of enrichment measured in the intracluster medium (ICM); however, there is increasing tension between this truism and the parsimonious assumption that the stars in the ...
Loewenstein, Michael
core +3 more sources
CHEMICAL ABUNDANCES OF THE LEO II DWARF GALAXY [PDF]
, 2008 We use previously published moderate-resolution spectra in combination with stellar atmosphere models to derive the first measured chemical abundance ratios in the Leo II dwarf Spheroidal (dSph) galaxy. We find that for spectra with signal-to-noise ratio
M. Shetrone +3 more
semanticscholar +1 more source
Globular cluster formation and evolution in the context of cosmological galaxy assembly: open questions [PDF]
Proceedings of the Royal Society A, 2018 We discuss some of the key open questions regarding the formation and evolution of globular clusters (GCs) during galaxy formation and assembly within a cosmological framework.
D. Forbes +11 more
semanticscholar +1 more source
Rapid Chemical Enrichment by Intermittent Star Formation in GN-z11
The Astrophysical Journal LettersWe interpret the peculiar supersolar nitrogen abundance recently reported by the James Webb Space Telescope observations for GN-z11 ( z = 10.6) using our state-of-the-art chemical evolution models.
Chiaki Kobayashi, Andrea Ferrara
doaj +1 more source
Planetary nebulae in the inner Milky Way: new abundances [PDF]
, 2009 The study of planetary nebulae in the inner-disk and bulge gives important information on the chemical abundances of elements such as He, N, O, Ar, Ne, and on the evolution of these abundances, which is associated with the evolution of intermediate-mass ...
Cavichia, O. +2 more
core +2 more sources
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. +10 more
core +1 more source
Tracing chemical evolution over the extent of the Milky Way's Disk with APOGEE Red Clump Stars [PDF]
, 2014 We employ the first two years of data from the near-infrared, high-resolution SDSS-III/APOGEE spectroscopic survey to investigate the distribution of metallicity and alpha-element abundances of stars over a large part of the Milky Way disk.
Anders, Friedrich +42 more
core +3 more sources
Reconciling the local galaxy population with damped Lyman α cross-sections and metal abundances [PDF]
, 2005 A comprehensive analysis of 355 high-quality Westerbork Synthesis Radio Telescope (WSRT) HI 21-cm line maps of nearby galaxies shows that the properties and incident rate of damped Lyman alpha absorption systems (DLAs) observed in the spectra of high ...
M. Zwaan +4 more
semanticscholar +1 more source
Long‐Term Elevated CO2 Improves Soil Health and Rice Yields in Paddy Fields
Advanced Science, EarlyView.Combining the two longest‐running rice free‐air CO2 enrichment experiments with a global data synthesis, this study demonstrates that long‐term elevated CO2 consistently enhances soil health. In rice paddies, this improvement sustains the CO2 fertilization effect over decades.
Fan Jiang +22 more
wiley +1 more source