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

Open clusters are central elements of our understanding of the Galactic diskevolution, as an accurate determination of their parameters leads to anunbiased picture of our Galaxy's structure. Extending the analysis towardsfainter magnitudes in cluster sequences has a significant impact on the derivedfundamental parameters, such as extinction and total mass. We perform ahomogeneous analysis of six open stellar clusters in the Galactic disk usingkinematic and photometric information from the Gaia DR2 and VVV surveys:NGC6067, NGC6259, NGC4815, Pismis18, Trumpler23, and Trumpler20. We implementtwo coarse-to-fine characterization methods: first, we employ Gaussian mixturemodels to tag fields around each open cluster in the proper motion space, andthen we apply an unsupervised machine learning method to make the membershipassignment to each cluster. For the studied clusters, with ages in the$\sim$120-1900 Myr range, we report an increase of $\sim$45 % new membercandidates on average in our sample. The data-driven selection approach ofcluster members makes our catalog a valuable resource for testing stellarevolutionary models and for assessing the cluster low-to-intermediate masspopulations. This study is the first of a series intended to homogeneouslyreveal open cluster near-infrared sequences.

The VVV Open Cluster Project. Near-infrared sequences of NGC6067, NGC6259, NGC4815, Pismis18, Trumpler23, and Trumpler20