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The Gaia -ESO survey : Open clusters as tracers of galactic chemical evolution

Boucher, K. ; Worley, C. C. ; Gilmore, G. ; Stonkutė, E. LU ; Magrini, L. ; Drazdauskas, A. ; Bragaglia, A. ; Tautvaišienè, G. ; Bensby, T. LU orcid and Jiménez-Esteban, F. , et al. (2026) In Astronomy and Astrophysics 705. p.1-13
Abstract

Aims. We investigate the formation and evolutionary trajectory of the Milky Way’s inner and outer galactic regions using stars from open clusters in the Gaia-ESO OC survey. Methods. Using numerical simulations from Chempy, we leveraged Markov chain Monte Carlo sampling techniques to derive galactic evolutionary parameters for each open cluster by fitting measured abundances of elements C, N, O, Mg, Si, Ca, Ti, Fe, Mn, Zn, Y, and Ba. Results. We find differing evolutionary histories between the inner and outer regions of the Milky Way that align with variations in the slope of the initial mass function, the rate of Type Ia supernovae, and the galactic metallicity gradient traced by open clusters. Conclusions. Our results support... (More)

Aims. We investigate the formation and evolutionary trajectory of the Milky Way’s inner and outer galactic regions using stars from open clusters in the Gaia-ESO OC survey. Methods. Using numerical simulations from Chempy, we leveraged Markov chain Monte Carlo sampling techniques to derive galactic evolutionary parameters for each open cluster by fitting measured abundances of elements C, N, O, Mg, Si, Ca, Ti, Fe, Mn, Zn, Y, and Ba. Results. We find differing evolutionary histories between the inner and outer regions of the Milky Way that align with variations in the slope of the initial mass function, the rate of Type Ia supernovae, and the galactic metallicity gradient traced by open clusters. Conclusions. Our results support established galactic formation and evolutionary theories, highlighting that the inner Galaxy had a short and intense early star formation epoch followed by reduced activity. In contrast, the outer Galaxy maintained a more sustained star formation history.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Galaxy: evolution, Galaxy: formation, open clusters and associations: general
in
Astronomy and Astrophysics
volume
705
pages
13 pages
publisher
EDP Sciences
external identifiers
  • scopus:105027939952
ISSN
0004-6361
DOI
10.1051/0004-6361/202556408
language
English
LU publication?
yes
id
489a7a4b-3ca2-4bc3-8072-ae37fdf41d59
date added to LUP
2026-02-25 15:23:45
date last changed
2026-02-25 15:24:40
@article{489a7a4b-3ca2-4bc3-8072-ae37fdf41d59,
  abstract     = {{<p>Aims. We investigate the formation and evolutionary trajectory of the Milky Way’s inner and outer galactic regions using stars from open clusters in the Gaia-ESO OC survey. Methods. Using numerical simulations from Chempy, we leveraged Markov chain Monte Carlo sampling techniques to derive galactic evolutionary parameters for each open cluster by fitting measured abundances of elements C, N, O, Mg, Si, Ca, Ti, Fe, Mn, Zn, Y, and Ba. Results. We find differing evolutionary histories between the inner and outer regions of the Milky Way that align with variations in the slope of the initial mass function, the rate of Type Ia supernovae, and the galactic metallicity gradient traced by open clusters. Conclusions. Our results support established galactic formation and evolutionary theories, highlighting that the inner Galaxy had a short and intense early star formation epoch followed by reduced activity. In contrast, the outer Galaxy maintained a more sustained star formation history.</p>}},
  author       = {{Boucher, K. and Worley, C. C. and Gilmore, G. and Stonkutė, E. and Magrini, L. and Drazdauskas, A. and Bragaglia, A. and Tautvaišienè, G. and Bensby, T. and Jiménez-Esteban, F. and Martell, S. and Randich, S. and Damiani, F.}},
  issn         = {{0004-6361}},
  keywords     = {{Galaxy: evolution; Galaxy: formation; open clusters and associations: general}},
  language     = {{eng}},
  pages        = {{1--13}},
  publisher    = {{EDP Sciences}},
  series       = {{Astronomy and Astrophysics}},
  title        = {{The Gaia -ESO survey : Open clusters as tracers of galactic chemical evolution}},
  url          = {{http://dx.doi.org/10.1051/0004-6361/202556408}},
  doi          = {{10.1051/0004-6361/202556408}},
  volume       = {{705}},
  year         = {{2026}},
}