Apsidal motion in massive close binary systems - I: HD 165052, an extreme case?
We present a new set of radial velocity measurements of the spectroscopic binary HD 165052 obtained by disentangling high-resolution optical spectra. The longitude of the periastron (ω = 60 ± 2°) shows a variation with respect to previous studies. We have determined the apsidal motion rate of the sy...
| Autores: | , , , |
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| Formato: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2013 |
| País: | Argentina |
| Recursos: | Universidad Nacional de La Plata |
| Repositorio: | SEDICI (UNLP) |
| Idioma: | inglés |
| OAI Identifier: | oai:sedici.unlp.edu.ar:10915/85536 |
| Acesso em linha: | http://sedici.unlp.edu.ar/handle/10915/85536 |
| Access Level: | acceso abierto |
| Palavra-chave: | Ciencias Astronómicas Binaries: close Binaries:Spectroscopic Early Fundamental parameters Stars Stars:Individual:HD 165052 stars:Massive. Type |
| Resumo: | We present a new set of radial velocity measurements of the spectroscopic binary HD 165052 obtained by disentangling high-resolution optical spectra. The longitude of the periastron (ω = 60 ± 2°) shows a variation with respect to previous studies. We have determined the apsidal motion rate of the system, ω = 12.1 ± 0.° 3 yr-1, which was used to calculate the absolute masses of the binary components: M1 = 22.5 ± 1.0Mȯ and M2 = 20.5 ± 0.9Mȯ. Analysing the separated spectra, we have reclassified the components as O7Vz and O7.5Vz stars. |
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