Table · dataset · 2014
R-band light curve of MY Cam
Listed in IVOA Registry (Virtual Observatory)
The early-type binary MY Cam belongs to the young open cluster Alicante 1, embedded in Cam OB3.
Description
MY Cam consists of two early-O type main-sequence stars and shows a photometric modulation suggesting an orbital period slightly above one day. We intend to confirm this orbital period and derive orbital and stellar parameters.
Timing analysis of a very exhaustive (4607 points) light curve indicates a period of 1.1754514+/-0.0000015d. High-resolution spectra and the cross-correlation technique implemented in the TODCOR program were used to derive radial velocities and obtain the corresponding radial velocity curves for MY Cam. Modelling with the stellar atmosphere code FASTWIND was used to obtain stellar parameters and create templates for cross-correlation.
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Stellar and orbital parameters were derived using the Wilson-Devinney code, such that a complete solution to the binary system could be described. We determine masses of the primary and secondary stars in MY Cam are 37.7+/-1.6 and 31.6+/-1.4M_{sun}_ , respectively. The corresponding temperatures, derived from the model atmosphere fit, are 42000 and 39000K, with the more massive component being hotter.
Both stars are overfilling their Roche lobes, sharing a common envelope. MY Cam contains the most massive dwarf O-type stars found so far in an eclipsing binary. Both components are still on the main sequence, and probably not far from the zero-age main sequence.
The system is a likely merger progenitor, owing to its very short period.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/572/A110 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2014A&A...572A.110L ui.adsabs.harvard.edu/abs/2014A%26A...572A.110L ↗
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/572/a110 ↗
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/a+a/572/a110 | 12 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 |