Reference : Optical spectroscopy of X-Mega targets - II. The massive double-lined O-type binary HD 9...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/34118
Optical spectroscopy of X-Mega targets - II. The massive double-lined O-type binary HD 93205
English
Morrell, N. I. [Facultad de Ciencias Astronómicas y Geofísicas, Universidad Nacional de La Plata, Paseo del Bosque S/N, B1900FWA La Plata, Argentina]
Barbá, R. H. [Facultad de Ciencias Astronómicas y Geofísicas, Universidad Nacional de La Plata, Paseo del Bosque S/N, B1900FWA La Plata, Argentina]
Niemela, V. S. [Facultad de Ciencias Astronómicas y Geofísicas, Universidad Nacional de La Plata, Paseo del Bosque S/N, B1900FWA La Plata, Argentina]
Corti, M. A. [Facultad de Ciencias Astronómicas y Geofísicas, Universidad Nacional de La Plata, Paseo del Bosque S/N, B1900FWA La Plata, Argentina]
Albacete Colombo, J. F. [Facultad de Ciencias Astronómicas y Geofísicas, Universidad Nacional de La Plata, Paseo del Bosque S/N, B1900FWA La Plata, Argentina]
Rauw, Grégor mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Groupe d'astrophysique des hautes énergies (GAPHE) - Sciences spatiales >]
Corcoran, M. [Universities Space Research Association, 7501 Forbes Blvd, Ste 206, Seabrook, MD 20706, USA ; Laboratory for High Energy Astrophysics, Goddard Space Flight Center, Greenbelt, MD 20771, USA]
Morel, Thierry [Inter-University Center for Astronomy and Astrophysics (IUCAA), Post Bag 4, Ganeshkhind, Pune 411 007, India > > > >]
Bertrand, J.-F. [Département de Physique, Université de Montréal, and Observatoire du Mont Mégantic, CP 6128, Succursale Centre-ville, Montréal,QC H3C 3J7, Canada]
Moffat, A. F. J. [Département de Physique, Université de Montréal, and Observatoire du Mont Mégantic, CP 6128, Succursale Centre-ville, Montréal,QC H3C 3J7, Canada]
St-Louis, N. [Département de Physique, Université de Montréal, and Observatoire du Mont Mégantic, CP 6128, Succursale Centre-ville, Montréal,QC H3C 3J7, Canada]
1-Sep-2001
Monthly Notices of the Royal Astronomical Society
Blackwell Publishing
326
85-94
Yes (verified by ORBi)
International
0035-8711
Oxford
United Kingdom
[en] BINARIES: GENERAL ; STARS: EARLY-TYPE ; STARS: INDIVIDUAL: HD 93205 ; X-RAYS: STARS
[en] A new high-quality set of orbital parameters for the O-type spectroscopic binary HD 93205 has been obtained combining échelle and coudé CCD observations. The radial velocity orbits derived from the Heii lambda4686Å (primary component) and Hei lambda4471Å (secondary component) absorption lines yield semi-amplitudes of 133+/-2 and 314+/-2kms[SUP]-1[/SUP] for each binary component, resulting in minimum masses of 31 and 13M[SUB]solar[/SUB] (q=0.42). We also confirm for the binary components the spectral classification of O3V+O8V previously assigned. Assuming for the O8V component a `normal' mass of 22-25M[SUB]solar[/SUB] we would derive for the primary O3V a mass of `only' 52-60M[SUB]solar[/SUB] and an inclination of about 55° for the orbital plane. We have also determined for the first time a period of apsidal motion for this system, namely 185+/-16yr using all available radial velocity data sets of HD 93205 (from 1975 to 1999). Phase-locked variations of the X-ray emission of HD 93205 consisting of a rise of the observed X-ray flux near periastron passage are also discussed.
http://hdl.handle.net/2268/34118
10.1046/j.1365-8711.2001.04500.x
http://adsabs.harvard.edu/abs/2001MNRAS.326...85M
http://de.arxiv.org/abs/astro-ph/0105014

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