Abudances of 41 open clusters

Open clusters have been extensively used as tracers of Galactic chemical evolution, as their constituent stars possess shared characteristics, including age, Galactocentric radius, metallicity, and chemical composition. By examining the trends of elemental abundances with metallicity, age, and Galactocentric radius, valuable insights can be gained into the distribution and nucleosynthetic origins of chemical elements across the Galactic disk. The infrared domain in particular facilitates the observation of some elemental abundances that can be challenging or impossible to discern in the optical; for example, K and F. The objective of this study is to derive the stellar parameters and elemental abundances of up to 23 elements in 114 stars spanning 41 open clusters using high-resolution infrared spectroscopy. In addition, the present study aims to examine the chemical evolution of the Galactic disk. This is achieved by investigating radial abundance gradients, variations in abundance between clusters, and the dependence of chemical abundances on the cluster age. Abundances for up to 23 elements, C, N, F, Na, Mg, Al, Si, S, K, Ca, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Y, Ce, Nd, and Yb, were derived and compared with available literature values where possible. Non-local thermodynamic equilibrium analysis was utilized for the elements C, Na, Mg, Al, Si, S, K, Ca, Ti, Mn, Fe, and Cu. For each element, Galactic trends were examined by analyzing both [X/Fe] and [X/H] as functions of [Fe/H], stellar age, and Galactocentric radius. In particular, the radial abundance gradient of Ytterbium is presented for the first time, thereby extending the observational constraints on heavy neutron-capture elements. Radial abundance gradients for a wide range of elements in the Galactic disk are found, with [X/Fe] slopes ranging from -0.061 to +0.065dex/kpc. The observed gradients are consistent with an inside-out formation scenario for the Galactic disk, wherein chemical enrichment proceeds from the inner regions to the outer ones over time. The observed [X/Fe] trends across multiple nucleosynthetic groups, including alpha elements, odd-Z elements, iron-peak elements, and neutron-capture elements such as Y, Ce, Nd, and Yb, reflect the diverse production sites and timescales associated with each group. In particular, the positive [Zn/H] and [Zn/Fe] gradients suggest a distinctive nucleosynthetic origin for Zn, possibly linked to metallicity-dependent yields. The positive gradient in [Yb/Fe] (0.065+/-0.031dex/kpc) provides significant new constraints on neutron-capture enrichment processes and the chemical evolution of the Galactic disk.

Cone search capability for table J/A+A/704/A220/table1 (Overview of observed clusters and stars)

Cone search capability for table J/A+A/704/A220/table5 (Per-cluster element completeness)

Identifier
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/A+A/704/A220
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/704/A220
Related Identifier https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/704/A220
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/A+A/704/A220
Provenance
Creator Bijavara Seshashayana S.; Joensson H.; D'Orazi V.; Bragaglia A.; Jian M.,Andreuzzi G.; Dal Ponte M.
Publisher CDS
Publication Year 2025
Rights https://cds.unistra.fr/vizier-org/licences_vizier.html
OpenAccess true
Contact CDS support team <cds-question(at)unistra.fr>
Representation
Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Galactic and extragalactic Astronomy; Interdisciplinary Astronomy; Natural Sciences; Observational Astronomy; Physics; Stellar Astronomy