The binary landscape of massive stars at low $Z$: Insights from the BLOeM Campaign
Fuente:
arXiv
Guardado en:
| Autores principales: | , , , , , , |
|---|---|
| Formato: | Preprint |
| Publicado: |
2025
|
| Materias: | |
| Acceso en línea: | |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| _version_ | 1866911259748728832 |
|---|---|
| author | Villaseñor, J. I. Sana, H. Bodensteiner, J. Britavskiy, N. Patrick, L. R. Shenar, T. Collaboration, the BLOeM |
| author_facet | Villaseñor, J. I. Sana, H. Bodensteiner, J. Britavskiy, N. Patrick, L. R. Shenar, T. Collaboration, the BLOeM |
| contents | We present an overview of our recent results from the BLOeM campaign in the Small Magellanic Cloud ($Z=0.2\,{\rm Z}_{\odot}$). Using nine-epoch VLT/FLAMES spectroscopy, we investigated the multiplicity of 929 massive stars. Our findings reveal contrasting binary properties across evolutionary stages: O-type stars show an intrinsic close-binary fraction of $70\%$, and early B-type dwarfs/giants reach ${\sim80}\%$, exceeding higher-metallicity samples. In contrast, B0-B3 supergiants drop to ${\sim40}\%$, and A-F supergiants to ${\sim8}\%$; intrinsic variability likely inflates the latter, so the true multiplicity may be lower. OBe stars display distinct binary properties consistent with a post-interaction origin. These results have profound implications for massive-star evolution at low metallicity, including the production of exotic transients, gravitational-wave progenitors, and ionising radiation in the early Universe. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_08675 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | The binary landscape of massive stars at low $Z$: Insights from the BLOeM Campaign Villaseñor, J. I. Sana, H. Bodensteiner, J. Britavskiy, N. Patrick, L. R. Shenar, T. Collaboration, the BLOeM Solar and Stellar Astrophysics We present an overview of our recent results from the BLOeM campaign in the Small Magellanic Cloud ($Z=0.2\,{\rm Z}_{\odot}$). Using nine-epoch VLT/FLAMES spectroscopy, we investigated the multiplicity of 929 massive stars. Our findings reveal contrasting binary properties across evolutionary stages: O-type stars show an intrinsic close-binary fraction of $70\%$, and early B-type dwarfs/giants reach ${\sim80}\%$, exceeding higher-metallicity samples. In contrast, B0-B3 supergiants drop to ${\sim40}\%$, and A-F supergiants to ${\sim8}\%$; intrinsic variability likely inflates the latter, so the true multiplicity may be lower. OBe stars display distinct binary properties consistent with a post-interaction origin. These results have profound implications for massive-star evolution at low metallicity, including the production of exotic transients, gravitational-wave progenitors, and ionising radiation in the early Universe. |
| title | The binary landscape of massive stars at low $Z$: Insights from the BLOeM Campaign |
| topic | Solar and Stellar Astrophysics |
| url | https://arxiv.org/abs/2511.08675 |