Table · dataset · 2026
The ALMA-QUARKS survey. III. Cores at 1.3mm
Listed in IVOA Registry (Virtual Observatory)
The Querying Underlying mechanisms of massive star formation with ALMA-Resolved gas Kinematics and Structures (QUARKS) survey observed 139 infrared-bright (IR-bright) massive protoclusters at 1.3mm wavelength with the Atacama Large Millimeter/submillimeter Array (ALMA).
Description
This study investigates clump-to-core fragmentation and searches for candidate high-mass starless cores within IR-bright clumps using combined ALMA 12m (C-2) and Atacama Compact Array 7m data, providing ~1" (~0.02pc at 3.7kpc) resolution and ~0.6mJy/beam continuum sensitivity (~0.3M_{sun}_ at 30K).
We identified 1562 compact cores from 1.3 mm continuum emission using getsf. Observed linear core separations ({lambda}obs) are significantly less than the thermal Jeans length ({lambda}J), with the {lambda}obs/{lambda}J ratios peaking at ~0.2. This indicates that thermal Jeans fragmentation has taken place within the IR-bright protocluster clumps studied here.
Read the rest (2 more)
The observed low ratio of {lambda}obs/{lambda}J<<1 could be the result of evolving core separation or hierarchical fragmentation. Based on associated signatures of star formation (e.g., outflows and ionized gas), we classified cores into three categories: 127 starless, 971 warm, and 464 evolved cores. Two starless cores have masses exceeding 16M_{sun}_, and represent high-mass candidates.
The scarcity of such candidates suggests that competitive accretion-type models could be more applicable than turbulent core accretion-type models in high-mass star formation within these IR-bright protocluster clumps.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/280/33 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2025ApJS..280...33Y ui.adsabs.harvard.edu/abs/2025ApJS..280...33Y ↗
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/280/33 ↗
catalogue entry · from IVOA Registry
Topics
- Stated by source
- Millimeter
- From keywords
- Astronomy & Astrophysics
Provenance · 1 source records, 8 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/apjs/280/33 | 11 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: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 |