Table · dataset · 2025
SWAS Massive Star Formation Regions
Listed in IVOA Registry (Virtual Observatory)
Molecular oxygen abundance is a key parameter in understanding the chemical network of the interstellar medium.
Description
We estimate the molecular oxygen column density and abundance for a sample of Galactic massive star formation regions based on observations from the Submillimiter Wave Astronomy Satellite (SWAS) survey. We obtained an averaged O_2_ spectrum based on this sample using the (SWAS) survey data (O_2_, 487.249GHz, N=3-1, J=3-2).
No emission or absorption feature is seen around the supposed central velocity with a total integration time of t_total_=8.67x10^3^hr and an rms noise per channel of 1.45mK. Assuming a kinetic temperature T_kin_=30K, we derive the 3{sigma} upper limit of the O_2_ column density to be 3.3x10^15^cm^-2^, close to the lowest values reported in Galactic massive star formation regions in previous studies. The corresponding O_2_ abundance upper limit is 6.7x10^-8^, lower than all previous results based on SWAS observations and is close to the lowest reported value in massive star formation regions.
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On a galactic scale, our statistical results confirm a generally low O_2_ abundance for Galactic massive star formation regions. This abundance is also lower than results reported in extragalactic sources.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/other/RAA/24.I5007 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2024RAA....24i5007W ui.adsabs.harvard.edu/abs/2024RAA....24i5007W ↗
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/other/raa/24.i5007 ↗
catalogue entry · from IVOA Registry
Topics
- Stated by source
- Millimeter
- From keywords
- Astronomy & Astrophysics
- Inferred from text
- Astronomical sciences 74%
Provenance · 1 source records, 9 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/other/raa/24.i5007 | 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 (74%) |
| 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 | |
| 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 |