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 globular cluster HP1 is projected on the bulge, very close to theGalactic center. The Multi-Conjugate Adaptive Optics (MCAO) Demonstrator (MAD)at the Very Large Telescope (VLT) allowed to acquire high resolution deepimages that, combined with first epoch New Technology Telescope (NTT) data,enabled to derive accurate proper motions. The cluster and bulge field stellarcontents were disentangled by means of this process, and produced unprecedenteddefinition in the color-magnitude diagrams for this cluster. The metallicity of[Fe/H] ~ -1.0 from previous spectroscopic analysis is confirmed, which togetherwith an extended blue horizontal branch, imply an age older than the haloaverage. Orbit reconstruction results suggest that HP1 is spatially confinedwithin the bulge.

A Fossil Bulge Globular Cluster revealed by VLT Multi-Conjugate Adaptive Optics