Table · dataset · 1998
MWC 314 spectroscopy
Listed in IVOA Registry (Virtual Observatory)
The results of high-resolution optical spectroscopy obtained for a recently suggested LBV (luminous blue variable) candidate, MWC 314, are presented.
Description
Photospheric lines mostly of N II and S II have been found for the first time with a resolution of 0.4-0.8{AA}. They imply a N/O overabundance previously reported for AG and HR Car since no O II absorptions were detected.
Nearly 400 emission lines have been identified in the spectrum between 4190 and 8864{AA} many of which appear double-peaked. No significant P Cygni type absorption components have been found for the optically thick Balmer lines. This suggests that the stellar wind of MWC 314 is non-spherical and the circumstellar envelope is viewed not edge on.
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The systemic velocity measured using the emission lines of ionized metals turned out to be 55km/s, which corresponds to a distance towards the object of 3.0+/-0.2kpc, according to the galactic rotation curve. Our analysis of the characteristics of both photospheric and wind lines resulted in an estimate of the object's T_eff_ of nearly 25000K, which, however, needs further improvement. The other stellar parameters were found to be as follows: Log(L_bol_/L_{sun}_)=6.1+/-0.3, R_star_=60^+30^_=10_R_{sun}_.
Our study confirms that MWC 314 is one of the most luminous stars in the Milky Way.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/A+AS/131/469 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 1998A&AS..131..469M ui.adsabs.harvard.edu/abs/1998A%26AS..131..469M ↗
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/a%2Bas/131/469 ↗
catalogue entry · from IVOA Registry
Topics
- Stated by source
- Optical
- 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/a+as/131/469 | 15 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: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 |