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

The goal of the Open Cluster Chemical Abundances and Mapping (OCCAM) surveyis to constrain key Galactic dynamic and chemical evolution parameters by theconstruction and analysis of a large, comprehensive, uniform data set ofinfrared spectra for stars in hundreds of open clusters. This sixthcontribution from the OCCAM survey presents analysis of SDSS/APOGEE DataRelease 17 (DR17) results for a sample of stars in 150 open clusters, 94 ofwhich we designate to be "high quality'' based on the appearance of theircolor-magnitude diagram. We find the APOGEE DR17-derived [Fe/H] values to be ingood agreement with those from previous high resolution spectroscopic opencluster abundance studies. Using a subset of the high quality sample, theGalactic abundance gradients were measured for 16 chemical elements, including[Fe/H], for both Galactocentric radius ($R_{GC}$) and guiding center radius($R_{Guide}$). We find an overall Galactic [Fe/H] vs $R_{GC}$ gradient of$-0.073 \pm 0.002$ dex/kpc over the range of $6 < R_{GC} < 11.5$ kpc, and asimilar gradient is found for [Fe/H] versus $R_{Guide}$. Significant Galacticabundance gradients are also noted for O, Mg, S, Ca, Mn, Na, Al, K and Ce. Ourlarge sample additionally allows us to explore the evolution of the gradientsin four age bins for the remaining 15 elements.

The Open Cluster Chemical Abundances and Mapping Survey: VI. Galactic Chemical Gradient Analysis from APOGEE DR17