Distant Galactic star clusters from Gaia DR3

Despite having data for over 10^9^ stars from Gaia, less than 10^4^ star clusters and candidates have been discovered. In particular, distant star clusters are rarely identified, due to the challenges posed by heavy extinction and great distance. However, Gaia data has continued to improve, enabling even fainter cluster members to be distinguished from field stars. In this work, we introduce a star-cluster search method based on the DBSCAN algorithm; we have made improvements to make it better suited for identifying clusters on dimmer and more distant stars. After having removed member stars of known Gaia-based clusters, we identified 2086 objects with |b|5mag. This has enabled us to detect a higher number of old clusters, over a billion years old, that are difficult to detect due to observational limitations. Our findings significantly expand the remote cluster sample and enhance our understanding of the limits of Gaia DR3 data in stellar aggregates research.

Cone search capability for table J/ApJS/267/34/table1 (Derived astrophysical parameters for the 2085 clusters detected in this work)

Cone search capability for table J/ApJS/267/34/table2 (The astrometric and photometric parameters of the member stars from Gaia DR3)

Cone search capability for table J/ApJS/267/34/ic10mmb (Gaia DR3 members of IC 10)

Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/ApJS/267/34
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/267/34
Related Identifier http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/267/34
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/ApJS/267/34
Creator He Z.; Luo Y.; Wang K.; Ren A.; Peng L.; Cui Q.; Liu X.; Jiang Q.
Publisher CDS
Publication Year 2023
Rights https://cds.unistra.fr/vizier-org/licences_vizier.html
OpenAccess true
Contact CDS support team <cds-question(at)unistra.fr>
Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Exoplanet Astronomy; Galactic and extragalactic Astronomy; Natural Sciences; Observational Astronomy; Physics; Stellar Astronomy