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Related papers: MINCE II. Neutron capture elements

200 papers

R-process enhanced metal-poor stars (\EuFe$\geq+0.3$ and \FeH$\leq-1.0$) are rare objects whose study can provide clues to the astrophysical sites of the rapid neutron capture process. In this study, we investigate the detailed chemical…

Solar and Stellar Astrophysics · Physics 2025-04-16 A. R. da Silva , R. Smiljanic

Our aim is to measure accurate, homogeneous neutron-capture element abundances for the sample of 32 EMP giant stars studied earlier in this series, including 22 stars with [Fe/H] $< -$3.0. Based on high-resolution, high S/N spectra from the…

Young open clusters (t<200 Myr) have been observed to exhibit several peculiarities in their chemical compositions, from a slightly sub-solar iron content, super-solar abundances of some atomic species (e.g. ionised chromium), and atypical…

The aim of this work is to determine abundances of neutron-capture elements for thin- and thick-disc F, G, and K stars in several sky fields near the north ecliptic pole and to compare the results with the Galactic chemical evolution…

The properties of the relative abundances of rapid and slow neutron-capture elements are studied using a catalog containing spectroscopic abundance determinations for 14~elements produced in various nuclear-synthesis processes for 90~open…

Astrophysics of Galaxies · Physics 2016-02-22 V. A. Marsakov , M. L. Gozha , V. V. Koval' , L. V. Shpigel'

The physical processes driving chemical evolution in the Milky Way can be probed using the distribution of abundances in low-mass FGK type stars in space phase at different times. During their final stages of evolution stars experience…

Solar and Stellar Astrophysics · Physics 2020-01-15 Paula Jofre , Holly Jackson , Marcelo Tucci Maia

Ground- and space-based observations of stellar heavy element abundances are providing a clearer picture of the chemical evolution of the Galaxy. A large number of (r)apid and (s)low neutron capture process elements, including the first…

Astrophysics · Physics 2007-05-23 John J Cowan , Christopher Sneden , James W Truran , Debra L Burris

For the first time, we present an extensive study of stars with individual non-local thermodynamic equilibrium (NLTE) abundances for 17 chemical elements from Li to Eu in a sample of stars uniformly distributed over the $-2.62 \le$ [Fe/H]…

Several works have found an increase of the abundances of the s-process neutron-capture elements in the youngest Galactic stellar populations, giving important constraints to stellar and Galactic evolution. We aim to trace the abundance…

This study probes the chemical abundances of the neutron-capture elements cerium and neodymium in the inner Milky Way from an analysis of a sample of $\sim$2000 stars in the Galactic Bulge/bar spatially contained within $|X_{Gal}|<$5 kpc,…

Studying the abundances in metal-poor globular clusters is crucial for understanding the formation of the Galaxy and the nucleosynthesis processes in the early Universe. We observed 13 red giant stars from the metal-poor globular cluster…

Solar and Stellar Astrophysics · Physics 2025-05-08 Avrajit Bandyopadhyay , Rana Ezzeddine , Vinicius M. Placco , Anna Frebel , David S Aguado , Ian U. Roederer

In a recent study, based on homogeneous barium abundance measurements in open clusters, a trend of increasing [Ba/Fe] ratios for decreasing cluster age was reported. We present here further abundance determinations, relative to four other…

Solar and Stellar Astrophysics · Physics 2015-05-28 E. Maiorca , S. Randich , M. Busso , L. Magrini , S. Palmerini

To better characterize the abundance patterns produced by the r-process, we have derived new abundances or upper limits for the heavy elements zinc (Zn), yttrium (Y), lanthanum (La), europium (Eu), and lead (Pb). Our sample of 161…

Solar and Stellar Astrophysics · Physics 2015-05-20 I. U. Roederer , J. J. Cowan , A. I. Karakas , K. -L. Kratz , M. Lugaro , J. Simmerer , K. Farouqi , C. Sneden

Recently an increasing number of studies were devoted to measure the abundances of neutron-capture elements heavier than iron in stars belonging to Galactic Open Clusters (OCs). OCs span a sizeable range in metallicity -0.6<[Fe/H]<+0.4),…

Solar and Stellar Astrophysics · Physics 2015-06-23 T. Mishenina , M. Pignatari , G. Carraro , V. Kovtyukh , L. Monaco , S. Korotin , E. Shereta , I. Yegorova , F. Herwig

Identifying stars found in the Milky Way as having formed in situ or accreted can be a complex and uncertain undertaking. We use Gaia kinematics and APOGEE elemental abundances to select stars belonging to the Gaia-Sausage-Enceladus (GSE)…

Astrophysics of Galaxies · Physics 2021-09-22 Diane K. Feuillet , Christian L. Sahlholdt , Sofia Feltzing , Luca Casagrande

We present abundances of Mn, Cu, Zn and various light and heavy elements for a sample of barium and normal giant stars, and present correlations between abundances contributed to different degrees by the weak-s, main-s, and r-processes of…

Solar and Stellar Astrophysics · Physics 2015-05-20 Dinah M. Allen , Gustavo F. Porto de Mello

We present a detailed chemical abundance study of evolved stars in 10 open clusters based on Hydra multi-object echelle spectra obtained with the WIYN 3.5m telescope. From an analysis of both equivalent widths and spectrum synthesis,…

Astrophysics of Galaxies · Physics 2015-05-28 H. R. Jacobson , C. A. Pilachowski , E. D. Friel

We use integrated-light spectroscopic observations to measure metallicities and chemical abundances for two extragalactic young massive star clusters (NGC1313-379 and NGC1705-1). The spectra were obtained with the X-Shooter spectrograph on…

Astrophysics of Galaxies · Physics 2017-07-19 Svea Hernandez , Søren Larsen , Scott Trager , Paul Groot

In massive stars (initial mass of > 9 solar masses), the weak s (slow neutron capture) process produces elements between Fe and Zr, enriching the Galaxy with these elements through core-collapse supernova explosions. The weak s-process…

Solar and Stellar Astrophysics · Physics 2025-12-01 Emma Kotar , Shuya Ota , Allyson Dewey , Joshua Millman , Lorenzo Roberti , Marco Pignatari

The hot intra-cluster medium (ICM) is rich in metals, which are synthesized by supernovae (SNe) explosions and accumulate over time into the deep gravitational potential well of clusters of galaxies. Since most of the elements visible in…

Astrophysics of Galaxies · Physics 2016-08-24 François Mernier , Jelle de Plaa , Ciro Pinto , Jelle S. Kaastra , Peter Kosec , Yu-Ying Zhang , Junjie Mao , Norbert Werner