Table · dataset · 2022
Kinematic and astrometric data for SBN stars
Listed in IVOA Registry (Virtual Observatory)
OB stars powering stellar bowshock nebulae (SBNe) have been presumed to have large peculiar velocities.
Description
We measured peculiar velocities of SBN central stars to assess their kinematics relative to the general O-star population using Gaia EDR3 data for 267 SBN central stars and a sample of 455 Galactic O stars to derive projected velocities v2D. For a subset of each sample, we obtained new optical spectroscopy to measure radial velocities and identify multiple-star systems.
We find a minimum multiplicity fraction of 36%{+/-}6% among SBN central stars, consistent with >28% among runaway Galactic O stars. The large multiplicity fraction among runaways implicates very efficient dynamical ejection rather than binary-supernova origins. The median v2D of SBN central stars is v2D =14.6km/s, larger than the median v2D=11.4km/s for non-bowshock O stars.
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Central stars of SBNe have a runaway (v2D>25km/s) fraction of 24_-7_^+9^%, consistent with the 22_-3_^+3^% for control-sample O stars. Most (76%) SBNe central stars are not runaways. Our analysis of alignment ({Delta}PA) between the nebular morphological and v2D kinematic position angles reveals two populations: a highly aligned ({sigma}PA=25{deg}) population that includes stars with the largest v2D (31% of the sample) and a random (nonaligned) population (69%).
SBNe that lie within or near HII regions comprise a larger fraction of this latter component than SBNe in isolated environments, implicating localized ISM flows as a factor shaping their orientations and morphologies. We outline a new conceptual approach to computing the solar local standard of rest motion, yielding [U{sun},V{sun},W{sun}]=[5.5,7.5,4.5]km/s.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/164/86 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2022AJ....164...86K ui.adsabs.harvard.edu/abs/2022AJ....164...86K ↗
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/aj/164/86 ↗
catalogue entry · from IVOA Registry
Topics
- Stated by source
- Optical
- From keywords
- Astronomy & Astrophysics
- Inferred from text
- Stellar astronomy and planetary systems 77%
Provenance · 1 source records, 9 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/aj/164/86 | 15 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[field].anzsrc:field:510109 | enrichment · IVOA Registry | taxonomy-embedding@1.1.0 | title+keywords+description (77%) |
| concepts[field].local:field:astronomy | mapping · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[modality].ivoa_waveband:optical | 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 |