Optical Spectroscopy of X-Mega Targets : I. CPD -59:2635: A New Double-Lined O-Type Binary in the Carina Nebula
- Autores
- Albacete Colombo, Juan Facundo; Morrell, Nidia Irene; Niemelä, Virpi Sinikka; Corcoran, Michael
- Año de publicación
- 2001
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Optical spectroscopy of CPD-59° 2635, one of the O-type stars in the open cluster Trumpler 16 in the Carina Nebula, reveals this star to be a double-lined binary system. We have obtained the first radial velocity orbit for this system, consisting of a circular solution with a period of 2.2999 d and semi-amplitudes of 208 and 273 km s−1. This results in minimum masses of 15 and 11 M? for the binary components of CPD-59° 2635, which we classified as O8V and O9.5V, although spectral type variations of the order of 1 subclass, which we identify as the Struve–Sahade effect, seem to be present in both components. From ROSAT HRI observations of CPD −59° 2635 we determine a luminosity ratio log(Lx/Lbol)≈−7, which is similar to that observed for other O-type stars in the Carina Nebula region. No evidence of light variations is present in the available optical or X-ray data sets.
Facultad de Ciencias Astronómicas y Geofísicas - Materia
-
Ciencias Astronómicas
astrofísica
binaries: general; stars: early-type; stars: individual: CPD 2598 2635; open clusters and associations: individual: Trumpler 16; 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:10915/2071
Ver los metadatos del registro completo
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Optical Spectroscopy of X-Mega Targets : I. CPD -59:2635: A New Double-Lined O-Type Binary in the Carina NebulaAlbacete Colombo, Juan FacundoMorrell, Nidia IreneNiemelä, Virpi SinikkaCorcoran, MichaelCiencias Astronómicasastrofísicabinaries: general; stars: early-type; stars: individual: CPD 2598 2635; open clusters and associations: individual: Trumpler 16; X-rays: starsOptical spectroscopy of CPD-59° 2635, one of the O-type stars in the open cluster Trumpler 16 in the Carina Nebula, reveals this star to be a double-lined binary system. We have obtained the first radial velocity orbit for this system, consisting of a circular solution with a period of 2.2999 d and semi-amplitudes of 208 and 273 km s−1. This results in minimum masses of 15 and 11 M? for the binary components of CPD-59° 2635, which we classified as O8V and O9.5V, although spectral type variations of the order of 1 subclass, which we identify as the Struve–Sahade effect, seem to be present in both components. From ROSAT HRI observations of CPD −59° 2635 we determine a luminosity ratio log(Lx/Lbol)≈−7, which is similar to that observed for other O-type stars in the Carina Nebula region. No evidence of light variations is present in the available optical or X-ray data sets.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/pdf78-84http://sedici.unlp.edu.ar/handle/10915/2071enginfo:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1046/j.1365-8711.2001.04497.x/pdfinfo:eu-repo/semantics/altIdentifier/issn/1365-2966info:eu-repo/semantics/altIdentifier/doi/10.1046/j.1365-8711.2001.04497.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:10915/2071Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-10-22 16:30:18.91SEDICI (UNLP) - Universidad Nacional de La Platafalse |
| dc.title.none.fl_str_mv |
Optical Spectroscopy of X-Mega Targets : I. CPD -59:2635: A New Double-Lined O-Type Binary in the Carina Nebula |
| title |
Optical Spectroscopy of X-Mega Targets : I. CPD -59:2635: A New Double-Lined O-Type Binary in the Carina Nebula |
| spellingShingle |
Optical Spectroscopy of X-Mega Targets : I. CPD -59:2635: A New Double-Lined O-Type Binary in the Carina Nebula Albacete Colombo, Juan Facundo Ciencias Astronómicas astrofísica binaries: general; stars: early-type; stars: individual: CPD 2598 2635; open clusters and associations: individual: Trumpler 16; X-rays: stars |
| title_short |
Optical Spectroscopy of X-Mega Targets : I. CPD -59:2635: A New Double-Lined O-Type Binary in the Carina Nebula |
| title_full |
Optical Spectroscopy of X-Mega Targets : I. CPD -59:2635: A New Double-Lined O-Type Binary in the Carina Nebula |
| title_fullStr |
Optical Spectroscopy of X-Mega Targets : I. CPD -59:2635: A New Double-Lined O-Type Binary in the Carina Nebula |
| title_full_unstemmed |
Optical Spectroscopy of X-Mega Targets : I. CPD -59:2635: A New Double-Lined O-Type Binary in the Carina Nebula |
| title_sort |
Optical Spectroscopy of X-Mega Targets : I. CPD -59:2635: A New Double-Lined O-Type Binary in the Carina Nebula |
| dc.creator.none.fl_str_mv |
Albacete Colombo, Juan Facundo Morrell, Nidia Irene Niemelä, Virpi Sinikka Corcoran, Michael |
| author |
Albacete Colombo, Juan Facundo |
| author_facet |
Albacete Colombo, Juan Facundo Morrell, Nidia Irene Niemelä, Virpi Sinikka Corcoran, Michael |
| author_role |
author |
| author2 |
Morrell, Nidia Irene Niemelä, Virpi Sinikka Corcoran, Michael |
| author2_role |
author author author |
| dc.subject.none.fl_str_mv |
Ciencias Astronómicas astrofísica binaries: general; stars: early-type; stars: individual: CPD 2598 2635; open clusters and associations: individual: Trumpler 16; X-rays: stars |
| topic |
Ciencias Astronómicas astrofísica binaries: general; stars: early-type; stars: individual: CPD 2598 2635; open clusters and associations: individual: Trumpler 16; X-rays: stars |
| dc.description.none.fl_txt_mv |
Optical spectroscopy of CPD-59° 2635, one of the O-type stars in the open cluster Trumpler 16 in the Carina Nebula, reveals this star to be a double-lined binary system. We have obtained the first radial velocity orbit for this system, consisting of a circular solution with a period of 2.2999 d and semi-amplitudes of 208 and 273 km s−1. This results in minimum masses of 15 and 11 M? for the binary components of CPD-59° 2635, which we classified as O8V and O9.5V, although spectral type variations of the order of 1 subclass, which we identify as the Struve–Sahade effect, seem to be present in both components. From ROSAT HRI observations of CPD −59° 2635 we determine a luminosity ratio log(Lx/Lbol)≈−7, which is similar to that observed for other O-type stars in the Carina Nebula region. No evidence of light variations is present in the available optical or X-ray data sets. Facultad de Ciencias Astronómicas y Geofísicas |
| description |
Optical spectroscopy of CPD-59° 2635, one of the O-type stars in the open cluster Trumpler 16 in the Carina Nebula, reveals this star to be a double-lined binary system. We have obtained the first radial velocity orbit for this system, consisting of a circular solution with a period of 2.2999 d and semi-amplitudes of 208 and 273 km s−1. This results in minimum masses of 15 and 11 M? for the binary components of CPD-59° 2635, which we classified as O8V and O9.5V, although spectral type variations of the order of 1 subclass, which we identify as the Struve–Sahade effect, seem to be present in both components. From ROSAT HRI observations of CPD −59° 2635 we determine a luminosity ratio log(Lx/Lbol)≈−7, which is similar to that observed for other O-type stars in the Carina Nebula region. No evidence of light variations is present in the available optical or X-ray data sets. |
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2001 |
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2001 |
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