Table · dataset · 2022
Molecular gas distribution from MWISP CO survey
Listed in IVOA Registry (Virtual Observatory)
We use the ~370deg^2^ data from the MWISP CO survey to study the vertical distribution of the molecular clouds (MCs) toward the tangent points in the region of l=[+16{deg},+52{deg}] and |b|<5.1.
Description
We find that the molecular disk consists of two components with a layer thickness (FWHM) of ~85pc and ~280pc, respectively. In the inner Galaxy, the molecular mass in the thin disk is dominant, while the molecular mass traced by the discrete MCs with weak CO emission in the thick disk is probably <~10% of the whole molecular disk.
For the CO gas in the thick disk, we identified 1055 high-z MCs that are >~100pc from the Galactic plane. However, only a few samples (i.e., 32 MCs or 3%) are located in the |z|>~360pc region. Typically, the discrete MCs of the thick-disk population have a median peak temperature of 2.1K, a median velocity dispersion of 0.8km/s, and a median effective radius of 2.5pc.
Read the rest (1 more)
Assuming a constant value of X_CO_=2x10^20^cm^-2^(K.km/s)^-1^, the median surface density of these MCs is 6.8M_{sun}_/pc^2^, indicating very faint CO emission for the high-z gas. The cloud-cloud velocity dispersion is 4.9+/-1.3km/s and a linear variation with a slope of ~-0.4km/s/kpc is obtained in the region of R_GC_=2.2-6.4kpc. Assuming that these clouds are supported by their turbulent motions against the gravitational pull of the disk, a model of _{rho}0_(R)=1.28M_{sun}_/pc^3^e^-(R/3.2kpc)^ can be used to describe the distribution of the total mass density in the Galactic midplane.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/910/131 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2021ApJ...910..131S ui.adsabs.harvard.edu/abs/2021ApJ...910..131S ↗
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/apj/910/131 ↗
catalogue entry · from IVOA Registry
Topics
- Stated by source
- Radio
- From keywords
- Astronomy & Astrophysics
- Inferred from text
- Astronomical sciences 71%
Provenance · 1 source records, 9 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/apj/910/131 | 10 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 (71%) |
| 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 |