Artículo
The VLT-FLAMES Tarantula Survey. II. R139 revealed as a massive binary system
Taylor, W. D.; Evans, C. J.; Sana, H.; Walborn, N. R.; de Mink, S. E.; Stroud, V. E.; Alvarez Candal, A.; Barba, Rodolfo Hector
; Bestenlehner, J. M.; Bonanos, A. Z.; Brott, I.; Crowther, P. A.; de Koter, A.; Friedrich, K.; Grafener, G.; Henault Brunet, V.; Herrero, A.; Kaper, L.; Langer, N.; Lennon, D. J.; Maiz Apellaniz, J.; Markova, N.; Morrell, Nidia Irene
; Monaco, L.; Vink, J.
![Icon](/themes/CONICETDigital/images/conicet.png)
![Icon](/themes/CONICETDigital/images/conicet.png)
Fecha de publicación:
06/2011
Editorial:
Edp Sciences
Revista:
Astronomy And Astrophysics
ISSN:
0004-6361
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
We report the discovery that R139 in 30 Doradus is a massive spectroscopic binary system. Multi-epoch optical spectroscopy of R139 was obtained as part of the VLT-FLAMES Tarantula Survey, revealing a double-lined system. The two components are of similar spectral types; the primary exhibits strong C III λ4650 emission and is classified as an O6.5 Iafc supergiant, while the secondary is an O6 Iaf supergiant. The radial-velocity variations indicate a highly eccentric orbit with a period of 153.9 days. Photometry obtained with the Faulkes Telescope South shows no evidence for significant variability within an 18 month period. The orbital solution yields lower mass limits for the components of M1sin3i = 78 ± 8 M⊙ and M2sin3i = 66 ± 7 M⊙. As R139 appears to be the most massive binary system known to contain two evolved Of supergiants, it will provide an excellent test for atmospheric and evolutionary models.
Palabras clave:
Binaries
,
Early-Type Stars
,
Open Clusters
,
Associations
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(ICATE)
Articulos de INST.D/CS ASTRONOMICAS D/LA TIERRA Y DEL ESPACIO
Articulos de INST.D/CS ASTRONOMICAS D/LA TIERRA Y DEL ESPACIO
Citación
Taylor, W. D.; Evans, C. J.; Sana, H.; Walborn, N. R.; de Mink, S. E.; et al.; The VLT-FLAMES Tarantula Survey. II. R139 revealed as a massive binary system; Edp Sciences; Astronomy And Astrophysics; 530; 6-2011; 10-13
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