English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

The Small Magellanic Cloud (SMC) is the host of a rich system of globularclusters (GCs) that span a wide age range. The chemical composition of the SMCclusters is still poorly understood, despite their significance to chemicalevolution studies. Here, we provide the first detailed chemical study ofevolved giants in three distinct clusters, NGC 121 (10.5 Gyr), NGC 339 (6 Gyr),and NGC 419 (1.4 Gyr). Results are based on high-resolution spectra obtainedwith FLAMES at the Very Large Telescope. The chemical fingerprints of theseclusters closely resemble those of SMC field stars, supporting the SMC'sspecific history of chemical enrichment relative to the Milky Way. Theapproximately solar-scaled [alpha/Fe] observed in all three clusters,independent of their [Fe/H], demonstrate the SMC's low star formationefficiency. Compared to their Milky Way counterparts, elements primarilyproduced by massive stars are severely underrepresented. Particularly, theyoung cluster NGC 419's extremely low [Zn/Fe] shows that hypernovae havecontributed relatively little during the past two Gyr. The three GCs have high[Eu/Fe] values regardless of their age. This suggests that the production ofthe r-process elements in the SMC was extremely efficient up to 1.5 Gyr ago,with an enrichment timescale comparable to that from Type Ia supernovae. Whenthe properties of the oldest SMC object NGC 121 are compared to those ofin-situ Milky Way clusters and accreted clusters linked to the Gaia-Enceladusmerger event, it is shown that the SMC had already attained the samemetallicity as Gaia-Enceladus but with lower [Fe/H] ratios at the age of NGC121. This suggests that the chemical enrichment histories of the early SMC andGaia-Enceladus differed, and that the SMC probably had a lower mass in itsearly ages than Gaia-Enceladus.

The chemical DNA of the Magellanic Clouds --II. High-resolution spectroscopy of the SMC globular clusters NGC 121, NGC 339 and NGC 419