Table · dataset · 2026
Galactic plane WR stars at 1.3GHz
Listed in IVOA Registry (Virtual Observatory)
Massive stars, including Wolf-Rayet stars (WR), are found mainly in binary systems.
Description
These systems are known to emit both thermal emission from stellar winds and sometimes non-thermal emission produced by relativistic electrons accelerated in the wind-wind interaction region. We intend to provide the most complete census of radio emission from WR stars in the Galactic plane, using the SARAO Meerkat Galactic Plane Survey (SMGPS) complemented by the MeerKAT Galactic Center Survey (MGCS).
Our main motivation is to identify hints of synchrotron radio emission indicative of particle-accelerating colliding-wind binaries (PACWB). We compiled an input catalogue of 428 WR stars positionally covered by the SMGPS and the MGCS. Using the Survey data, we measured the radio emission at 1.3GHz for detected WR stars, and we measured the upper limits for objects located in sufficiently low radio background regions.
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For detected objects, we searched for a radio excess by comparing the measured fluxes to two different evaluators of the thermal emission from massive star winds. We detected 23 targets and determined the upper limits for 279 WR stars. Among the detected objects, 15 display a (significant or potential) radio excess that cannot be explained by unresolved circumstellar emission of any kind.
Removing already known PACWBs, we report on the identification of 12 potential new PACWB candidates. Our study led to the compilation of the most extensive catalogue of Galactic WR radio (snapshot) emission to date, based on a homogeneous data set covering the Galactic plane. The low detection rate indicates either a low occurrence rate of synchrotron emission or substantial attenuation by turnover processes, certainly dominated by free-free absorption from the WR wind material.
Our results open the door for dedicated follow-up observations to ascertain the nature of the identified radio excesses.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/713/A154 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2026A&A...713A.154T ui.adsabs.harvard.edu/abs/2026A%26A...713A.154T ↗
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/713/a154 ↗
catalogue entry · from IVOA Registry
Topics
- Stated by source
- Radio
- From keywords
- Astronomy & Astrophysics
- Inferred from text
- Astronomical sciences 69%
Provenance · 1 source records, 9 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/a+a/713/a154 | 15 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 (69%) |
| concepts[field].local:field:astronomy | mapping · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[modality].ivoa_waveband:radio | 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 |