Table · dataset · 2025
BLOeM. SMC early B supergiants multiplicity
Listed in IVOA Registry (Virtual Observatory)
The blue supergiant (BSG) domain contains a large variety of stars for which the past and future evolutionary paths are still highly uncertain.
Description
As binary interaction plays a crucial role in the fate of massive stars, investigating the multiplicity among BSGs sheds light on the fate of such objects. We aim to estimate the binary fraction of a large sample of BSGs in the Small Magellanic Cloud within the BLOeM survey.
In total, we selected 262 targets with spectral types B0-B3, and luminosity classes I-II. This work is based on spectroscopic data collected by the GIRAFFE instrument mounted on the Very Large Telescope, which gathered nine epochs within three months. Our spectroscopic analysis for each target includes individual and peak-to-peak radial velocity measurements, investigation of the line profile variability, and a periodogram analysis for searching for possible short- and long-period binaries.
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By applying a 20km/s threshold on the peak-to-peak radial velocities above which we consider the star to be binary, the resulting observed spectroscopic binary fraction for our BSG sample is 23+/-3%. Independent analysis of line profile variability reveals 11 (plus 5 candidates) double-lined spectroscopic binaries and 32 (plus 41 candidates) single-lined spectroscopic binaries. Based on these results, we estimate the overall observed binary fraction in this sample to be 34+/-3%, which is similar to the computed intrinsic binary fraction of 40+/-4%.
In addition, we derived reliable orbital periods for 41 spectroscopic binaries and potential binary candidates among which there are 17 eclipsing binaries, including 20 SB1 and SB2 systems with periods less than 10 days. We report a significant drop in the binary fraction of BSGs with spectral types later than B2 and effective temperatures less than 18kK, which could indicate the end of main sequence phase at this temperature regime.
We found no metallicity dependence in the binary fraction of BSGs compared to existing spectroscopic surveys of the Galaxy and Large Magellanic Cloud.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/698/A40 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2025A&A...698A..40B ui.adsabs.harvard.edu/abs/2025A%26A...698A..40B ↗
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%2Ba/698/a40 ↗
catalogue entry · from IVOA Registry
Topics
- From keywords
- Astronomy & Astrophysics
- Inferred from text
- Astronomical sciences 69%
Provenance · 1 source records, 8 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/a+a/698/a40 | 14 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 (69%) |
| concepts[field].local:field:astronomy | mapping · 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 |