Agglomerate of early-type Hipparcos stars

We study the spatial structure and sub-structure of regions rich in Hipparcos stars with blue BT-VT colours. These regions, which comprise large stellar complexes, OB associations, and young open clusters, are tracers of on-going star formation in the Galaxy. The DBSCAN (Density-Based Spatial Clustering of Applications with Noise) data clustering algorithm is used to look for spatial overdensities of early-type stars. Once an overdensity, "agglomerate", is identified, we carry out a data and bibliographic compilation of their star member candidates. The actual membership in agglomerate of each early-type star is studied based on its heliocentric distance, proper motion, and previous spectro-photometric information. We identify 35 agglomerates of early-type Hipparcos stars. Most of them are associated to previously known clusters and OB associations. The previously unknown P Puppis agglomerate is subject of a dedicated study with Virtual Observatory tools.

Cone search capability for table J/AN/329/801/table1 (Agglomerates of early-type Hipparcos stars)

Cone search capability for table J/AN/329/801/tablea1 (Early-type Hipparcos stars in aggregates)

Identifier
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/AN/329/801
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AN/329/801
Related Identifier http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AN/329/801
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/AN/329/801
Provenance
Creator Caballero J.A.; Dinis L.
Publisher CDS
Publication Year 2009
Rights https://cds.unistra.fr/vizier-org/licences_vizier.html
OpenAccess true
Contact CDS support team <cds-question(at)unistra.fr>
Representation
Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Galactic and extragalactic Astronomy; Natural Sciences; Physics; Stellar Astronomy