Results 31 to 40 of about 876,778 (355)
Clustering in the stellar abundance space [PDF]
Monthly Notices of the Royal Astronomical Society, 2017 15 pages, 13 figures, accepted by MNRAS, author scientific names were ...
R. Boesso, H. J. Rocha-Pinto
openaire +3 more sources
Robust Data-driven Metallicities for 175 Million Stars from Gaia XP Spectra
The Astrophysical Journal Supplement Series, 2023 We derive and publish data-driven estimates of stellar metallicity [M/H] for ∼175 million stars with low-resolution XP spectra published in Gaia DR3.
René Andrae +2 more
doaj +1 more source
Constraining Collapsar r-process Models through Stellar Abundances [PDF]
Astrophysical Journal, 2019 We use observations of heavy elements in very metal-poor stars ([Fe/H] < −2.5) in order to place constraints on the viability of collapsar models as a significant source of the r-process.
P. Macias, E. Ramirez-Ruiz
semanticscholar +1 more source
Intriguing Revelations from Lithium, Beryllium, and Boron
The Astrophysical Journal, 2023 This is a report on some highlights of research on the rare light elements, lithium (Li), beryllium (Be), and boron (B), that were presented at my Henry Norris Russell Lecture in 2020 January.
Ann Merchant Boesgaard
doaj +1 more source
Stellar Abundances for Galactic Archaeology Database IV - Compilation of Stars in Dwarf Galaxies [PDF]
, 2017 We have constructed the database of stars in the local group using the extended version of the SAGA (Stellar Abundances for Galactic Archaeology) database that contains stars in 24 dwarf spheroidal galaxies and ultra faint dwarfs.
T. Suda +9 more
semanticscholar +1 more source
Constraints on Super-Earth Interiors from Stellar Abundances [PDF]
, 2017 Modeling the interior of exoplanets is essential to go further than the conclusions provided by mean density measurements. In addition to the still limited precision on the planets’ fundamental parameters, models are limited by the existence of ...
B. Brugger +3 more
semanticscholar +1 more source
The Astrophysical Journal, 2023 We present the first isotopic abundances of both ^13 CO and C ^18 O in solar twin stars and test the results against several galactic chemical evolution (GCE) models with different nucleosynthesis prescriptions.
David R. Coria +5 more
doaj +1 more source
WHAT ARE LITTLE WORLDS MADE OF? STELLAR ABUNDANCES AND THE BUILDING BLOCKS OF PLANETS [PDF]
, 2015 If the photospheres of solar-type stars represent the composition of circumstellar disks from which any planets formed, spectroscopic determinations of stellar elemental abundances offer information on the composition of those planets, including smaller,
E. Gaidos
semanticscholar +1 more source
The Abundance of S-Process Elements: Temporal and Spatial Trends from Open Cluster Observations
Universe, 2022 Spectroscopic observations of stars belonging to open clusters, with well-determined ages and distances, are a unique tool for constraining stellar evolution, nucleosynthesis, mixing processes, and, ultimately, Galactic chemical evolution.
Laura Magrini +8 more
doaj +1 more source
Constraining planet structure from stellar chemistry: the cases of CoRoT-7, Kepler-10, and Kepler-93 [PDF]
, 2015 We explore the possibility that the stellar relative abundances of different species can be used to constrain the bulk abundances of known transiting rocky planets.
Adibekyan, V. +12 more
core +2 more sources