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 Plus annual

Presents the access of premium content as premium feature

Premium Content

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 annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We used a combination of optical and near-UV Hubble Space Telescopephotometry and FLAMES/ESO-VLT high-resolution spectroscopy to characterize thestellar content of the old and massive globular cluster (GC) NGC121 in theSmall Magellanic Cloud (SMC). We report on the detection of multiple stellarpopulations, the first case in the SMC stellar cluster system. This resultenforces the emerging scenario in which the presence of multiple stellarpopulations is a distinctive-feature of old and massive GCs regardless of theenvironment, as far as the light element distribution is concerned. We findthat second population (SG) stars are more centrally concentrated than first(FG) ones. More interestingly, at odds with what typically observed in GalacticGCs, we find that NGC121 is the only cluster so far to be dominated by FG starsthat account for more than 65% of the total cluster mass. In the frameworkwhere GCs were born with a 90-95% of FG stars, this observational finding wouldsuggest that either NGC121 experienced a milder stellar mass-loss with respectto Galactic GCs or it formed a smaller fraction of SG stars.

Multiple populations in the old and massive Small Magellanic Cloud globular cluster NGC121