TOPoS. IV. Chemical abundances from high-resolution observations of seven extremely metal-poor stars
Sign Up to like & getrecommendations! Published in 2018 at "Astronomy and Astrophysics"
DOI: 10.1051/0004-6361/201732320
Abstract: Context. Extremely metal-poor (EMP) stars provide us with indirect information on the first generations of massive stars. The TOPoS survey has been designed to increase the census of these stars and to provide a chemical… read more here.
Keywords: poor stars; metal poor; sdss; extremely metal ... See more keywords
Inhomogeneity in the early Galactic chemical enrichment exposed by beryllium abundances in extremely metal-poor stars
Sign Up to like & getrecommendations! Published in 2020 at "Astronomy and Astrophysics"
DOI: 10.1051/0004-6361/202039101
Abstract: Abundances of beryllium in metal-poor stars scale linearly with metallicity down to [Fe/H] ~ -3.0. In the stars where Be has been detected at this extremely metal-poor regime, an increased abundance scatter has been previously… read more here.
Keywords: poor stars; metal poor; abundances extremely; inhomogeneity early ... See more keywords
Sodium Abundances in Very Metal-poor Stars
Sign Up to like & getrecommendations! Published in 2023 at "Research in Astronomy and Astrophysics"
DOI: 10.1088/1674-4527/accdc3
Abstract: Chemical composition of very metal-poor (VMP) stars can provide observational constraints on current models of nucleosynthesis and the chemical evolution of the Galaxy. It had been found that the scatter of [Na/Fe] versus [Fe/H] in… read more here.
Keywords: poor stars; sodium abundances; abundances metal; metal poor ... See more keywords
The oldest and most metal-poor stars in the APOSTLE Local Group simulations.
Sign Up to like & getrecommendations! Published in 2017 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stw2873
Abstract: We examine the spatial distribution of the oldest and most metal-poor stellar populations of Milky Way-sized galaxies using the A Project Of Simulating The Local Environment (APOSTLE) cosmological hydrodynamical simulations of the Local Group. In… read more here.
Keywords: oldest metal; poor stars; metal poor; local group ... See more keywords
Pop III i-process nucleosynthesis and the elemental abundances of SMSS J0313-6708 and the most iron-poor stars
Sign Up to like & getrecommendations! Published in 2018 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnrasl/slx190
Abstract: © 2017 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. We have investigated a highly energetic H-ingestion event during shell He burning leading to H-burning luminosities of log (L… read more here.
Keywords: poor stars; pop iii; nucleosynthesis; process ... See more keywords
Empirical Determination of Dark Matter Velocities Using Metal-Poor Stars.
Sign Up to like & getrecommendations! Published in 2018 at "Physical review letters"
DOI: 10.1103/physrevlett.120.041102
Abstract: The Milky Way dark matter halo is formed from the accretion of smaller subhalos. These sub-units also harbor stars-typically old and metal-poor-that are deposited in the Galactic inner regions by disruption events. In this Letter, we… read more here.
Keywords: poor stars; metal poor; matter; dark matter ... See more keywords