Table · dataset · 2026
Third quadrant bright VPHAS+ photometry
Listed in IVOA Registry (Virtual Observatory)
The southern Galactic plane has been mapped at optical wavelengths and at under 1-arcsec angular resolution by the VST Photometric Halpha Survey of the Galactic plane and bulge (VPHAS+).
Description
Ahead of the release of a uniform photometric calibration of the entire survey footprint, we examine the properties of r<19 VPHAS+ point-source photometry in the third Galactic quadrant. Our interim calibration in g, r and i is compared with that of Pan-STARRS, DECaPS-2 and Skymapper, revealing the need for small gri photometric offsets.
Corrections to the Halpha and u magnitude scales are determined via comparison with synthetic photometry. VPHAS+ and its northern counterpart, IGAPS, are shown to closely align across the celestial equator. Aided by Gaia DR3, SIMBAD, and specialist catalogues, we explore selections of: A stars; sub-luminous stars; intrinsically-red luminous stars; young stellar objects; emission-line and OB stars.
Read the rest (2 more)
Attention is drawn to stellar variability as a contaminant in selecting emission line objects via (r - Halpha) excess. The (r-i, r-Halpha) plane appears better for this selection than the alternative (g-i, r-Halpha) plane. Using A stars to map extinction, we show that dust obscuration is greater at negative Galactic latitudes.
Like the dust, OB and emission line stars are more frequent below the Galactic equator: at heliocentric distances of up to ~7kpc, these stars' distribution fit in with the known warping of the Galactic plane. An overdensity of B stars, several degrees across and potentially in the Outer Arm, is found around (l,b) = (212.0, -0.6).
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/545/F2137 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2026MNRAS.545f2137D ui.adsabs.harvard.edu/abs/2026MNRAS.545f2137D ↗
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/mnras/545/f2137 ↗
catalogue entry · from IVOA Registry
Topics
- From keywords
- Astronomy & Astrophysics
- Inferred from text
- Astronomical sciences 72%
Provenance · 1 source records, 10 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/mnras/545/f2137 | 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 (72%) |
| 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 | |
| concepts[modality].ivoa_waveband:optical | 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 |