The massive double-lined O-type binary HD 165052

We present a new optical spectroscopic study of the O-type binary HD 165052 based on high-and intermediate-resolution CCD observations. We re-investigated the spectral classification of the binary components, obtaining spectral types of O6.5 V and O7.5 V for the primary and secondary, respectively,...

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Detalles Bibliográficos
Autores principales: Arias, Julia Inés, Morrell, Nidia Irene, Barbá, Rodolfo Héctor, Bosch, Guillermo Luis, Grosso, M., Corcoran, Michael
Formato: Articulo
Lenguaje:Inglés
Publicado: 2002
Materias:
Ciencias Astronómicas
Binaries: General
Stars: Early-type
Stars: Individual: Hd 165052
X-rays: Stars
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/84665
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-84665
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
Binaries: General
Stars: Early-type
Stars: Individual: Hd 165052
X-rays: Stars
spellingShingle Ciencias Astronómicas
Binaries: General
Stars: Early-type
Stars: Individual: Hd 165052
X-rays: Stars
Arias, Julia Inés
Morrell, Nidia Irene
Barbá, Rodolfo Héctor
Bosch, Guillermo Luis
Grosso, M.
Corcoran, Michael
The massive double-lined O-type binary HD 165052
topic_facet Ciencias Astronómicas
Binaries: General
Stars: Early-type
Stars: Individual: Hd 165052
X-rays: Stars
description We present a new optical spectroscopic study of the O-type binary HD 165052 based on high-and intermediate-resolution CCD observations. We re-investigated the spectral classification of the binary components, obtaining spectral types of O6.5 V and O7.5 V for the primary and secondary, respectively, finding that both stars display weak CIII λ5696 emission in their spectra. We also determined a radial-velocity orbit for HD 165052 with a period of 2.95510 ± 0.00001 d, and semi-amplitudes of 94.8 and 104.7 ± 0.5km s<SUP>-1</SUP>, resulting in a mass ratio Q = 0.9. From a comparison with previous radial-velocity determinations, we found evidence of apsidal motion in the system. Several signatures of wind-wind collision, such as phase-locked variability of the X-ray flux and the Struve-Sahade effect, are also considered. It was also found that the reddening in the region should be normal, in contrast with previous determinations.
format Articulo
Articulo
author Arias, Julia Inés
Morrell, Nidia Irene
Barbá, Rodolfo Héctor
Bosch, Guillermo Luis
Grosso, M.
Corcoran, Michael
author_facet Arias, Julia Inés
Morrell, Nidia Irene
Barbá, Rodolfo Héctor
Bosch, Guillermo Luis
Grosso, M.
Corcoran, Michael
author_sort Arias, Julia Inés
title The massive double-lined O-type binary HD 165052
title_short The massive double-lined O-type binary HD 165052
title_full The massive double-lined O-type binary HD 165052
title_fullStr The massive double-lined O-type binary HD 165052
title_full_unstemmed The massive double-lined O-type binary HD 165052
title_sort massive double-lined o-type binary hd 165052
publishDate 2002
url http://sedici.unlp.edu.ar/handle/10915/84665
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