The massive double-lined O-type binary HD 165052

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dc.creatorArias, J. I.
dc.creatorMorrell, N. I.
dc.creatorBarba, R. H.
dc.creatorBosch, G. L.
dc.creatorGrosso, M.
dc.creatorCorcoran, M.
dc.creator.
dc.date2002-05-07
dc.date.accessioned2026-07-07T10:47:24Z
dc.date.available2026-07-07T10:47:24Z
dc.descriptionWe 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 C {\sc iii} $\lambda5696$ emission in their spectra. We also determined a radial-velocity orbit for HD 165052 with a period of 2.95510 $\pm$ 0.00001 d, and semiamplitudes of 94.8 and 104.7 $\pm$ 0.5 km s$^{-1}$, 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.
dc.description9 pages, 5 tables, 9 figures. Accepted by Monthly Notices
dc.identifierhttps://arxiv.org/abs/astro-ph/0205106
dc.identifierhttp://arxiv.org/abs/astro-ph/0205106
dc.identifierMon.Not.Roy.Astron.Soc.333:202,2002
dc.identifierdoi:10.1046/j.1365-8711.2002.05404.x
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/183523
dc.subjectAstrophysics
dc.titleThe massive double-lined O-type binary HD 165052
dc.typetext

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