Table · dataset · 2023
C^18^O dense cores identified in the CMC region
Listed in IVOA Registry (Virtual Observatory)
We present the survey of ^12^CO/^13^CO/C^18^O (J=1-0) toward the California molecular cloud (CMC) within the region of 161.75{deg}<=l<=167.75{deg}, -9.5{deg}<=b<=-7.5{deg} using the Purple Mountain Observatory (PMO) 13.7m millimeter telescope.
Description
Adopting a distance of 470pc, the mass of the observed molecular cloud estimated from ^12^CO, ^13^CO, and C^18^O is about 2.59x10^4^, 0.85x10^4^, and 0.09x10^4^M_{sun}_, respectively.
A large-scale continuous filament extending about 72pc is revealed from the ^13^CO images. A systematic velocity gradient perpendicular to the major axis appears and is measured to be ~0.82km/s/pc. The kinematics along the filament shows an oscillation pattern with a fragmentation wavelength of ~2.3pc and velocity amplitude of ~0.92km/s, which may be related to core-forming flows.
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Furthermore, assuming an inclination angle to the plane of the sky of 45{deg}, the estimated average accretion rate is ~101M_{sun}_/Myr for the cluster LkH{alpha} 101 and ~21M_{sun}_/Myr for the other regions. In the C^18^O observations, the large-scale filament could be resolved into multiple substructures, and their dynamics are consistent with the scenario of filament formation from converging flows. Approximately 225 C^18^O cores are extracted, of which 181 are starless cores.
Roughly 37% (67/181) of the starless cores have {alpha}vir less than 1. Twenty outflow candidates are identified along the filament. Our results indicate active early-phase star formation along the large-scale filament in the CMC region.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/921/23 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2021ApJ...921...23G ui.adsabs.harvard.edu/abs/2021ApJ...921...23G ↗
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/921/23 ↗
catalogue entry · from IVOA Registry
Topics
- Stated by source
- Radio
- From keywords
- Astronomy & Astrophysics
- Inferred from text
- Image 65%
Provenance · 1 source records, 9 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/apj/921/23 | 15 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 | |
| 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 (65%) |
| 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 |