Optical spectroscopy of X-Mega targets : II. The massive double-lined O-type binary HD93205

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 He iiλ4686 Å (primary component) and He iλ4471 Å (secondary component) absorption lines yield semi-amp...

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Autores principales:	Morrell, Nidia Irene, Barbá, Rodolfo Héctor, Niemelä, Virpi Sinikka, Corti, Mariela Alejandra, Albacete Colombo, Juan Facundo, Rauw, G., Corcoran, Michael, Morel, T., Bertrand, J. F., Moffat, Anthony, St-Louis, Nicole
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2001
Materias:	Ciencias Astronómicas Astrofísica binaries: general stars: early-type stars: individual: HD 93205 X-rays: stars
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/2072 http://onlinelibrary.wiley.com/doi/10.1046/j.1365-8711.2001.04500.x/pdf http://onlinelibrary.wiley.com/doi/10.1046/j.1365-8711.2001.04500.x/full
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-2072
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 Astrofísica binaries: general stars: early-type stars: individual: HD 93205 X-rays: stars
spellingShingle	Ciencias Astronómicas Astrofísica binaries: general stars: early-type stars: individual: HD 93205 X-rays: stars Morrell, Nidia Irene Barbá, Rodolfo Héctor Niemelä, Virpi Sinikka Corti, Mariela Alejandra Albacete Colombo, Juan Facundo Rauw, G. Corcoran, Michael Morel, T. Bertrand, J. F. Moffat, Anthony St-Louis, Nicole Optical spectroscopy of X-Mega targets : II. The massive double-lined O-type binary HD93205
topic_facet	Ciencias Astronómicas Astrofísica binaries: general stars: early-type stars: individual: HD 93205 X-rays: stars
description	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 He iiλ4686 Å (primary component) and He iλ4471 Å (secondary component) absorption lines yield semi-amplitudes of 133±2 and 314±2 km s−1 for each binary component, resulting in minimum masses of 31 and 13 M⊙(q=0.42). We also confirm for the binary components the spectral classification of O3 V+ O8 V previously assigned. Assuming for the O8 V component a ‘normal’ mass of 22–25 M⊙ we would derive for the primary O3 V a mass of ‘only’52–60 M⊙ 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±16 yr 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.
format	Articulo Articulo
author	Morrell, Nidia Irene Barbá, Rodolfo Héctor Niemelä, Virpi Sinikka Corti, Mariela Alejandra Albacete Colombo, Juan Facundo Rauw, G. Corcoran, Michael Morel, T. Bertrand, J. F. Moffat, Anthony St-Louis, Nicole
author_facet	Morrell, Nidia Irene Barbá, Rodolfo Héctor Niemelä, Virpi Sinikka Corti, Mariela Alejandra Albacete Colombo, Juan Facundo Rauw, G. Corcoran, Michael Morel, T. Bertrand, J. F. Moffat, Anthony St-Louis, Nicole
author_sort	Morrell, Nidia Irene
title	Optical spectroscopy of X-Mega targets : II. The massive double-lined O-type binary HD93205
title_short	Optical spectroscopy of X-Mega targets : II. The massive double-lined O-type binary HD93205
title_full	Optical spectroscopy of X-Mega targets : II. The massive double-lined O-type binary HD93205
title_fullStr	Optical spectroscopy of X-Mega targets : II. The massive double-lined O-type binary HD93205
title_full_unstemmed	Optical spectroscopy of X-Mega targets : II. The massive double-lined O-type binary HD93205
title_sort	optical spectroscopy of x-mega targets : ii. the massive double-lined o-type binary hd93205
publishDate	2001
url	http://sedici.unlp.edu.ar/handle/10915/2072 http://onlinelibrary.wiley.com/doi/10.1046/j.1365-8711.2001.04500.x/pdf http://onlinelibrary.wiley.com/doi/10.1046/j.1365-8711.2001.04500.x/full
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Optical spectroscopy of X-Mega targets : II. The massive double-lined O-type binary HD93205

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