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

Long-slit near-infrared (NIR) spectra of the Galactic nuclear star cluster(NSC) are discussed. The spectra sample the major axis of the NSC out to itshalf light radius. The equivalent widths of NaI2.21um and CaI2.26um outside ofthe center of the NSC, where light from nuclear bulge stars contributes a largefraction to the total flux, are consistent with solar chemical mixtures. Incontrast, the equivalent widths of NaI2.21um and CaI2.26um near the center ofthe NSC are larger than expected from models with solar chemical mixtures, evenafter light from the brightest evolved stars is removed. That NaI2.21um andCaI2.26um are deeper than predicted for solar chemical mixtures over a range ofevolutionary states is consistent with previous studies that find that themajority of stars near the center of the NSC formed from material that hadnon-solar chemical mixtures. A spectrum of nebular emission and the youngeststars near the GC is also extracted. The equivalent widths of emission featuresin the extracted NIR spectrum are similar to those in the nuclear spectrum ofNGC 253, and it is argued that this agreement is best achieved if the currentepisode of star formation near the center of the NSC has been in progress forat least a few Myr.

The Near-Infrared Spectrum of the Nuclear Star Cluster: Looking Below the Tip of the Iceberg and Comparisons with Extragalactic Nuclei