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 demonstrate that low‐resolution Ca  ii  triplet (CaT) spectroscopic estimates of the overall metallicity ([Fe/H]) of individual red giant branch (RGB) stars in two nearby dwarf spheroidal galaxies (dSphs) agree to ±0.1–0.2 dex with detailed high‐resolution spectroscopic determinations for the same stars over the range  −2.5 &lt; [Fe/H] &lt; −0.5 . For this study, we used a sample of 129 stars observed in low‐ and high‐resolution modes with VLT/FLAMES in the Sculptor and Fornax dSphs. We also present the data‐reduction steps we used in our low‐resolution analysis and show that the typical accuracy of our velocity and CaT [Fe/H] measurement is ∼2 km s −1  and 0.1 dex, respectively. We conclude that CaT–[Fe/H] relations calibrated on globular clusters can be applied with confidence to RGB stars in composite stellar populations over the range  −2.5 &lt; [Fe/H] &lt; −0.5 .

Analysis and calibration of Ca ii triplet spectroscopy of red giant branch stars from VLT/FLAMES observations