Table · dataset · 2023
CHIRON radial velocities of 5 Be+sdO binaries
Listed in IVOA Registry (Virtual Observatory)
Close binary interactions may play a critical role in the formation of the rapidly rotating Be-stars.
Description
Mass transfer can result in a mass gainer star spun up by the accretion of mass and angular momentum, while the mass donor is stripped of its envelope to form a hot and faint helium star. Far-UV spectroscopy has led to the detection of about 20 such binary Be+sdO systems.
Here we report on a 3yr program of high-quality spectroscopy designed to determine the orbital periods and physical properties of five Be-binary systems. These binaries are long orbital period systems with P=95-237days and small semiamplitude K1<11km/s. We combined the Be star velocities with prior sdO measurements to obtain mass ratios.
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A Doppler tomography algorithm shows the presence of the HeII{lambda}4686-line in the faint spectrum of the hot companion in four of the targets. We discuss the observed line variability and show evidence of phase-locked variations in the emission profiles of HD157832, suggesting a possible disk spiral density wave due to the presence of the companion star. The stripped companions in HD113120 and HD137387 may have a mass larger than 1.4M{sun}, indicating that they could be progenitors of Type Ib and Ic supernovae.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/165/203 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2023AJ....165..203W ui.adsabs.harvard.edu/abs/2023AJ....165..203W ↗
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/165/203 ↗
catalogue entry · from IVOA Registry
Topics
- Stated by source
- Optical
- From keywords
- Astronomy & Astrophysics
Provenance · 1 source records, 8 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/aj/165/203 | 13 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: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 |