Table · dataset · 2026
JCMT SCUBA-2 obs. of M31 with Herschel & Planck data
Listed in IVOA Registry (Virtual Observatory)
We have carried out unprecedentedly deep, nearly confusion-limited JCMT SCUBA-2 mapping observations on the nearest spiral galaxy, M31 (Andromeda).
Description
The 850{mu}m image with a ~50pc resolution yields a comprehensive catalog of 383 giant molecular clouds (GMCs) that are associated with the spiral arms. In addition, it unveiled a population of 189 compact interarm GMCs in M31, which are mostly unresolved or marginally resolved.
The masses of all these GMCs are in the range of 2x10^4^-6x10^6^M_{sun}_; the sizes are in the range of 30-130pc. They follow a mass-size correlation, M{propto}Rc^2.5^. The interarm GMCs are systematically less massive, more diffuse, colder, and have lower star formation efficiency (SFE) than on-arm GMCs.
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Moreover, within individual spatially resolved on-arm and off-arm M31 GMCs, the SFE is considerably lower than the SFE in molecular clouds in main-sequence and green valley galaxies. Follow-up investigations on M31 GMCs may provide clues for how star formation may be quenched in galactic environments. Finally, we reconstrained the dust opacity spectral index {beta} in the M31 galaxy by combining our new JCMT observations with archival Herschel and Planck data and found that the radial variation in {beta} may not be as large as has been proposed by previous studies.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/282/39 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2026ApJS..282...39J ui.adsabs.harvard.edu/abs/2026ApJS..282...39J ↗
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/apjs/282/39 ↗
catalogue entry · from IVOA Registry
Topics
- Stated by source
- Millimeter · Radio
- From keywords
- Astronomy & Astrophysics
- Inferred from text
- Astronomical sciences 70% · Image 75%
Provenance · 1 source records, 11 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/apjs/282/39 | 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 (70%) |
| concepts[field].local:field:astronomy | mapping · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[modality].ivoa_waveband:millimeter | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[modality].ivoa_waveband:radio | 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 (75%) |
| 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 |