Table · dataset · 2025
Candidate red supergiants from Gaia DR3
Listed in IVOA Registry (Virtual Observatory)
Our position within the Galactic plane and the dust obscuration make it challenging to retrieve a true picture of the Milky Way's morphology.
Description
While the Milky Way has been recognized as a barred spiral galaxy since the 1960s, there is still uncertainty about the exact number of spiral arms it contains. Currently, our understanding of the galaxy is evolving, thanks to the unprecedented details provided by Gaia's parallactic distances.
To shed light on the spatial distribution of red supergiants (RSGs) on the Plane and their uniformity of parameters across it, a census of galactic RSGs detected by Gaia is needed. Candidate RSGs are extracted from the combined Gaia DR3 and 2MASS catalogs using color criteria and parallactic distances. The sample included 335 stars which were not included in catalogs of previously known RSGs detected by Gaia DR3.
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Interstellar and circumstellar extinction values are estimated from the infrared bands. Spectral types are collected from Simbad or VIZIER databases and, for 135 candidates, are inferred from the Gaia DR3 BPRP spectra. Stellar luminosities are inferred using photometric measurements and the Gaia DR3 distances.
The analysis performed warrants a genuine sample of O-rich late-type stars, and the calculated luminosities confirm that the sample is mostly made of stars brighter than Mbol=-5mag. This new sample represents a 40% increase of the number of highly-probable RSGs compared to previous studies. When looking at the X and Y distribution on the Galactic plane, beside the populous Perseus associations of RSGs, and the Sagittarius group of RSGs, a novel population of highly-probable RSGs populating the more distant Scutum-Centaurus arm appears.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/698/A282 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2025A&A...698A.282M ui.adsabs.harvard.edu/abs/2025A%26A...698A.282M ↗
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/698/a282 ↗
catalogue entry · from IVOA Registry
Topics
- From keywords
- Astronomy & Astrophysics
Provenance · 1 source records, 7 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/a+a/698/a282 | 14 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 | |
| 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 |