The Stellar Abundances for Galactic Archaeology (SAGA) data base - II. Implications for mixing and nucleosynthesis in extremely metal-poor stars and chemical enrichment of the Galaxy [PDF]
, 2010 We discuss the characteristics of known extremely metal-poor (EMP) stars in the Galaxy using the Stellar Abundances for Galactic Archaeology (SAGA) database (Suda et al. 2008, PASJ, 60, 1159).
T. Suda +6 more
semanticscholar +1 more source
Chromium: NLTE abundances in metal-poor stars and nucleosynthesis in the Galaxy [PDF]
, 2010 Aims. We investigate statistical equilibrium of Cr in the atmospheres of late-type stars to ascertain whether the systematic abundance discrepancy between Cr I and Cr II lines, as often found in previous work, is due to deviations from local ...
M. Bergemann, G. Cescutti
semanticscholar +1 more source
The Evolution of the Elemental Abundances in the Gas and Dust Phases of the Galaxy [PDF]
, 1997 We present models for the evolution of the elemental abundances in the gas and dust phases of the interstellar medium (ISM) of our Galaxy by generalizing standard models for its dynamical and chemical evolution.
E. Dwek
semanticscholar +1 more source
Detection of an oxygen emission line from a high-redshift galaxy in the reionization epoch [PDF]
Science, 2016 Shining brightly in the early universe Galaxies that formed early in the history of the universe were powerful sources of ultraviolet radiation. This radiation ionized the surrounding intergalactic medium during the “epoch of reionization.” Inoue et al ...
A. Inoue +16 more
semanticscholar +1 more source
The galaxy clustering crisis in abundance matching [PDF]
Monthly Notices of the Royal Astronomical Society, 2018 Abstract Galaxy clustering on small scales is significantly underpredicted by sub-halo abundance matching (SHAM) models that populate (sub-)haloes with galaxies based on peak halo mass, Mpeak. SHAM models based on the peak maximum circular velocity, Vpeak, have had much better success.
Duncan Campbell +7 more
openaire +2 more sources
R-process enrichment from a single event in an ancient dwarf galaxy [PDF]
Nature, 2015 Elements heavier than zinc are synthesized through the rapid (r) and slow (s) neutron-capture processes. The main site of production of the r-process elements (such as europium) has been debated for nearly 60 years.
A. Ji, A. Frebel, A. Chiti, J. Simon
semanticscholar +1 more source
Oxygen and nitrogen abundances in Virgo and field spirals [PDF]
, 2001 The oxygen and nitrogen abundances in the HII regions of the nine Virgo spirals of the sample from Skillman et al (1996) and in nine field spiral galaxies are re-determined with the recently suggested P - method.
Alloin +79 more
core +2 more sources
EXTRAGALACTIC CHEMICAL ABUNDANCES: DO H ii REGIONS AND YOUNG STARS TELL THE SAME STORY? THE CASE OF THE SPIRAL GALAXY NGC 300 [PDF]
, 2009 We have obtained new spectrophotometric data for 28 H ii regions in the spiral galaxy NGC 300, a member of the nearby Sculptor Group. The detection of several auroral lines, including [O iii] λ4363, [S iii] λ6312, and [N ii] λ5755, has allowed us to ...
F. Bresolin +5 more
semanticscholar +1 more source
Sulphur in the Sculptor dwarf spheroidal galaxy - Including NLTE corrections [PDF]
, 2015 In Galactic halo stars, sulphur has been shown to behave like other $\alpha$-elements, but until now, no comprehensive studies have been done on this element in stars of other galaxies.
Andrievsky, Sergei M. +6 more
core +4 more sources
CHEMICAL ABUNDANCES IN CLUSTERS OF GALAXIES
, 1995 25 pages of uuencoded compressed PostScript. 4 PostScript figures and 4 PostScript tables available from http://www-astro.physics.ox.ac.uk/~bkg/gibson.html Accepted for publication in Astronomy & Astrophysics.
MATTEUCCI, MARIA FRANCESCA +1 more
openaire +3 more sources