Abudances of 41 open clusters Virtual Observatory Resource

Authors
  1. Bijavara Seshashayana S.
  2. Joensson H.
  3. D'Orazi V.
  4. Bragaglia A.
  5. Jian M.,Andreuzzi G.
  6. Dal Ponte M.
  7. Published by
    CDS
Abstract

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.

Keywords
  1. milky-way-galaxy
  2. open-star-clusters
  3. giant-stars
  4. chemical-abundances
  5. infrared-astronomy
  6. spectroscopy
Bibliographic source Bibcode
2025A&A...704A.220B
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/704/A220
IVOA Identifier IVOID
ivo://CDS.VizieR/J/A+A/704/A220

Access

Web browser access HTML
https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/704/A220
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/704/A220
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/704/A220
IVOA Table Access TAP
https://tapvizier.cds.unistra.fr/TAPVizieR/tap
Run SQL-like queries with TAP-enabled clients (e.g., TOPCAT).
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/704/A220/table1?
https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/704/A220/table1?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/704/A220/table1?
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/704/A220/table5?
https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/704/A220/table5?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/704/A220/table5?

History

2025-12-18T13:18:01Z
Resource record created
2025-12-18T12:18:51Z
Updated
2025-12-18T13:18:01Z
Created

Contact

Name
CDS support team
Postal Address
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
E-Mail
cds-question@unistra.fr