Table · dataset · 2026
CANDiSC cluster detections in VVVX
Listed in IVOA Registry (Virtual Observatory)
The VISTA Variables in the Via Lactea (VVV) and its eXtension VVVX are near-infrared surveys mapping the Galactic bulge and adjacent disk.
Description
These datasets have enabled the discovery of numerous star clusters obscured by high and spatially variable extinction. Most previous searches relied on visual inspection of individual tiles, which is inefficient and biased against faint or low-density systems.
We aim to develop an automated and homogeneous algorithm for systematic cluster detection across different surveys. Here we apply our method to VVVX data covering low-latitude regions of the Galactic bulge and disk, affected by extinction and crowding. We introduce the Consensus-based Algorithm for Nonparametric Detection of Star Clusters (CANDISC), which integrates kernel density estimation (KDE), density-based spatial clustering (DBSCAN), and nearest-neighbour density estimation (NNDE) within a consensus framework.
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A stellar overdensity is classified as a candidate when identified by at least two of these methods. We apply CANDISC to 680 tiles in the VVVX PSF photometric catalogue, covering approximately 1100 square degrees. We detect 163 stellar overdensities, of which 118 correspond to known clusters.
Cross-matching with recent catalogues yields five additional matches, leaving 40 likely new candidates not present in previous compilations. The estimated false-positive rate is below five percent. CANDISC offers a robust and scalable approach for detecting stellar clusters in deep near-infrared surveys, successfully recovering known systems and revealing new candidates in the obscured and crowded regions of the Galactic plane.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/705/A244 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2026A&A...705A.244O ui.adsabs.harvard.edu/abs/2026A%26A...705A.244O ↗
publication · from IVOA Registry
Catalogue records · 2
- VOResource record dc.g-vo.org/oai.xml?verb=GetRecord&metadataPrefix=ivo_vor&identifier=ivo%3… ↗
metadata API · from IVOA Registry
- Registry record (GAVO) dc.g-vo.org/I/cds.vizier/j/a%2Ba/705/a244 ↗
catalogue entry · from IVOA Registry
Topics
- Stated by source
- Infrared
- From keywords
- Astronomy & Astrophysics
- Inferred from text
- Astronomical sciences 70%
Provenance · 1 source records, 9 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/a+a/705/a244 | 14 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[field].anzsrc:group:5101 | enrichment · IVOA Registry | taxonomy-embedding@1.1.0 | title+keywords+description (70%) |
| concepts[field].local:field:astronomy | mapping · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[modality].ivoa_waveband:infrared | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| description | source · IVOA Registry | connector:ivoa_registry@1.0.0 | rr.resource.res_description |
| license_text | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| publication_date | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| title | source · IVOA Registry | connector:ivoa_registry@1.0.0 | rr.resource.res_title |
| updated_date | source · IVOA Registry | connector:ivoa_registry@1.0.0 |