Table · dataset · 2025
Dwarf galaxy candidates detection
Listed in IVOA Registry (Virtual Observatory)
The missing satellites problem remains a core issue of the {LAMBDA}CDM model.
Description
On small-scale, the number of observed dwarf galaxies is still fewer than the number predicted by existing theories. Therefore, finding fainter dwarf galaxies in deeper images is crucial for refining the existing theoretical framework.
In this study, we propose an end-to-end automatic identification scheme for small size and faint dwarf galaxies based on DESI photometric images and provide a batch of dwarf galaxy candidates. We develop a dwarf galaxy automatic detection model, YOLO-DG, based on the YOLOv7 framework, achieving a precision of 88.2% and a recall of 89.1% on the test set. We identify 742251 dwarf galaxy candidates across the entire DESI DR9 footprint using YOLO-DG, with their spectral redshifts concentrated in the range of 0 to 0.1.
Read the rest (2 more)
The faintest dwarf galaxy candidates detected by YOLO-DG have magnitudes of 31.61mag, 27.62mag, and 32.78mag in the g, r, and z bands, respectively. We identify 95230 local volume dwarf galaxy candidates, 33 of which are identified based on spectral redshift. The half-light radius of the smallest local volume dwarf galaxy candidate is 0.31 arcsec.
Finally, we provide a complete catalog of local volume dwarf galaxy candidates.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/696/A130 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2025A&A...696A.130Y ui.adsabs.harvard.edu/abs/2025A%26A...696A.130Y ↗
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/696/a130 ↗
catalogue entry · from IVOA Registry
Topics
- Stated by source
- Optical
- From keywords
- Astronomy & Astrophysics
- Inferred from text
- Image 65%
Provenance · 1 source records, 9 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/a+a/696/a130 | 12 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[field].local:field:astronomy | mapping · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[modality].ivoa_waveband:optical | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[modality].local:modality:image | enrichment · IVOA Registry | keyword-concept-rules@1.0.0 | title+description (65%) |
| 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 |