Optical spectroscopy of X-Mega targets : II. The massive double-lined O-type binary HD93205
- Autores
- 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
- Año de publicación
- 2001
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- 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.
Facultad de Ciencias Astronómicas y Geofísicas - Materia
-
Ciencias Astronómicas
Astrofísica
binaries: general
stars: early-type
stars: individual: HD 93205
X-rays: stars - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by-nc-nd/4.0/
- Repositorio
.jpg)
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/2072
Ver los metadatos del registro completo
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Optical spectroscopy of X-Mega targets : II. The massive double-lined O-type binary HD93205Morrell, Nidia IreneBarbá, Rodolfo HéctorNiemelä, Virpi SinikkaCorti, Mariela AlejandraAlbacete Colombo, Juan FacundoRauw, G.Corcoran, MichaelMorel, T.Bertrand, J. F.Moffat, AnthonySt-Louis, NicoleCiencias AstronómicasAstrofísicabinaries: generalstars: early-typestars: individual: HD 93205X-rays: starsA 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.Facultad de Ciencias Astronómicas y Geofísicas2001info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf85-94http://sedici.unlp.edu.ar/handle/10915/2072enginfo:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1046/j.1365-8711.2001.04500.x/pdfinfo:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1046/j.1365-8711.2001.04500.x/fullinfo:eu-repo/semantics/altIdentifier/issn/1365-2966info:eu-repo/semantics/altIdentifier/doi/10.1046/j.1365-8711.2001.04500.xinfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-nd/4.0/Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-10-22T16:30:18Zoai:sedici.unlp.edu.ar:10915/2072Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-10-22 16:30:18.913SEDICI (UNLP) - Universidad Nacional de La Platafalse |
| dc.title.none.fl_str_mv |
Optical spectroscopy of X-Mega targets : II. The massive double-lined O-type binary HD93205 |
| title |
Optical spectroscopy of X-Mega targets : II. The massive double-lined O-type binary HD93205 |
| spellingShingle |
Optical spectroscopy of X-Mega targets : II. The massive double-lined O-type binary HD93205 Morrell, Nidia Irene Ciencias Astronómicas Astrofísica binaries: general stars: early-type stars: individual: HD 93205 X-rays: stars |
| 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 |
| dc.creator.none.fl_str_mv |
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 |
Morrell, Nidia Irene |
| 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_role |
author |
| author2 |
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 |
| author2_role |
author author author author author author author author author author |
| dc.subject.none.fl_str_mv |
Ciencias Astronómicas Astrofísica binaries: general stars: early-type stars: individual: HD 93205 X-rays: stars |
| topic |
Ciencias Astronómicas Astrofísica binaries: general stars: early-type stars: individual: HD 93205 X-rays: stars |
| dc.description.none.fl_txt_mv |
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. Facultad de Ciencias Astronómicas y Geofísicas |
| 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. |
| publishDate |
2001 |
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2001 |
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eng |
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