Optical spectroscopy of X-mega targets in the Carina nebula : VI. FO 15: A new O-type double-lined eclipsing binary
- Autores
- Niemelä, Virpi Sinikka; Morrell, Nidia Irene; Fernández Lajús, Eduardo Eusebio; Barbá, Rodolfo Héctor; Albacete Colombo, Juan Facundo; Orellana, Mariana Dominga
- Año de publicación
- 2006
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- We report the discovery of a new O-type double-lined spectroscopic binary with a short orbital period of 1.4 d. We find the primary component of this binary, FO 15, to have an approximate spectral type O5.5Vz, i.e. a zero-age main-sequence (ZAMS) star. The secondary appears to be of spectral type O9.5V. We have performed a numerical model fit to the public All Sky Automated Survey photometry, which shows that FO 15 is also an eclipsing binary. We find an orbital inclination of ∼80°. From a simultaneous light curve and radial velocity solution, we find the masses and radii of the two components to be 30 ± 1 and 16 ± 1 M⊙ and 7.5 ± 0.5 and 5.3 ± 0.5 R⊙. These radii, and hence also the luminosities, are smaller than those of normal O-type stars, but similar to recently born ZAMS O-type stars. The absolute magnitudes derived from our analysis locate FO 15 at the same distance as η Carinæ. From Chandra and XMM X-ray images, we also find that there are two close X-ray sources: one coincident with FO 15 and the other one without optical counterpart. The latter seems to be a highly variable source, presumably due to a pre-main-sequence stellar neighbour of FO 15.
Facultad de Ciencias Astronómicas y Geofísicas - Materia
-
Ciencias Astronómicas
Binaries: eclipsing
Binaries: spectroscopic
Stars: fundamental parameters
Stars: individual: FO 15
X-rays: stars - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by-nc-sa/4.0/
- Repositorio
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/83104
Ver los metadatos del registro completo
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Optical spectroscopy of X-mega targets in the Carina nebula : VI. FO 15: A new O-type double-lined eclipsing binaryNiemelä, Virpi SinikkaMorrell, Nidia IreneFernández Lajús, Eduardo EusebioBarbá, Rodolfo HéctorAlbacete Colombo, Juan FacundoOrellana, Mariana DomingaCiencias AstronómicasBinaries: eclipsingBinaries: spectroscopicStars: fundamental parametersStars: individual: FO 15X-rays: starsWe report the discovery of a new O-type double-lined spectroscopic binary with a short orbital period of 1.4 d. We find the primary component of this binary, FO 15, to have an approximate spectral type O5.5Vz, i.e. a zero-age main-sequence (ZAMS) star. The secondary appears to be of spectral type O9.5V. We have performed a numerical model fit to the public All Sky Automated Survey photometry, which shows that FO 15 is also an eclipsing binary. We find an orbital inclination of ∼80°. From a simultaneous light curve and radial velocity solution, we find the masses and radii of the two components to be 30 ± 1 and 16 ± 1 M⊙ and 7.5 ± 0.5 and 5.3 ± 0.5 R⊙. These radii, and hence also the luminosities, are smaller than those of normal O-type stars, but similar to recently born ZAMS O-type stars. The absolute magnitudes derived from our analysis locate FO 15 at the same distance as η Carinæ. From Chandra and XMM X-ray images, we also find that there are two close X-ray sources: one coincident with FO 15 and the other one without optical counterpart. The latter seems to be a highly variable source, presumably due to a pre-main-sequence stellar neighbour of FO 15.Facultad de Ciencias Astronómicas y Geofísicas2006info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf1450-1456http://sedici.unlp.edu.ar/handle/10915/83104enginfo:eu-repo/semantics/altIdentifier/issn/0035-8711info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1365-2966.2006.10046.xinfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-10-22T16:56:37Zoai:sedici.unlp.edu.ar:10915/83104Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-10-22 16:56:37.338SEDICI (UNLP) - Universidad Nacional de La Platafalse |
dc.title.none.fl_str_mv |
Optical spectroscopy of X-mega targets in the Carina nebula : VI. FO 15: A new O-type double-lined eclipsing binary |
title |
Optical spectroscopy of X-mega targets in the Carina nebula : VI. FO 15: A new O-type double-lined eclipsing binary |
spellingShingle |
Optical spectroscopy of X-mega targets in the Carina nebula : VI. FO 15: A new O-type double-lined eclipsing binary Niemelä, Virpi Sinikka Ciencias Astronómicas Binaries: eclipsing Binaries: spectroscopic Stars: fundamental parameters Stars: individual: FO 15 X-rays: stars |
title_short |
Optical spectroscopy of X-mega targets in the Carina nebula : VI. FO 15: A new O-type double-lined eclipsing binary |
title_full |
Optical spectroscopy of X-mega targets in the Carina nebula : VI. FO 15: A new O-type double-lined eclipsing binary |
title_fullStr |
Optical spectroscopy of X-mega targets in the Carina nebula : VI. FO 15: A new O-type double-lined eclipsing binary |
title_full_unstemmed |
Optical spectroscopy of X-mega targets in the Carina nebula : VI. FO 15: A new O-type double-lined eclipsing binary |
title_sort |
Optical spectroscopy of X-mega targets in the Carina nebula : VI. FO 15: A new O-type double-lined eclipsing binary |
dc.creator.none.fl_str_mv |
Niemelä, Virpi Sinikka Morrell, Nidia Irene Fernández Lajús, Eduardo Eusebio Barbá, Rodolfo Héctor Albacete Colombo, Juan Facundo Orellana, Mariana Dominga |
author |
Niemelä, Virpi Sinikka |
author_facet |
Niemelä, Virpi Sinikka Morrell, Nidia Irene Fernández Lajús, Eduardo Eusebio Barbá, Rodolfo Héctor Albacete Colombo, Juan Facundo Orellana, Mariana Dominga |
author_role |
author |
author2 |
Morrell, Nidia Irene Fernández Lajús, Eduardo Eusebio Barbá, Rodolfo Héctor Albacete Colombo, Juan Facundo Orellana, Mariana Dominga |
author2_role |
author author author author author |
dc.subject.none.fl_str_mv |
Ciencias Astronómicas Binaries: eclipsing Binaries: spectroscopic Stars: fundamental parameters Stars: individual: FO 15 X-rays: stars |
topic |
Ciencias Astronómicas Binaries: eclipsing Binaries: spectroscopic Stars: fundamental parameters Stars: individual: FO 15 X-rays: stars |
dc.description.none.fl_txt_mv |
We report the discovery of a new O-type double-lined spectroscopic binary with a short orbital period of 1.4 d. We find the primary component of this binary, FO 15, to have an approximate spectral type O5.5Vz, i.e. a zero-age main-sequence (ZAMS) star. The secondary appears to be of spectral type O9.5V. We have performed a numerical model fit to the public All Sky Automated Survey photometry, which shows that FO 15 is also an eclipsing binary. We find an orbital inclination of ∼80°. From a simultaneous light curve and radial velocity solution, we find the masses and radii of the two components to be 30 ± 1 and 16 ± 1 M⊙ and 7.5 ± 0.5 and 5.3 ± 0.5 R⊙. These radii, and hence also the luminosities, are smaller than those of normal O-type stars, but similar to recently born ZAMS O-type stars. The absolute magnitudes derived from our analysis locate FO 15 at the same distance as η Carinæ. From Chandra and XMM X-ray images, we also find that there are two close X-ray sources: one coincident with FO 15 and the other one without optical counterpart. The latter seems to be a highly variable source, presumably due to a pre-main-sequence stellar neighbour of FO 15. Facultad de Ciencias Astronómicas y Geofísicas |
description |
We report the discovery of a new O-type double-lined spectroscopic binary with a short orbital period of 1.4 d. We find the primary component of this binary, FO 15, to have an approximate spectral type O5.5Vz, i.e. a zero-age main-sequence (ZAMS) star. The secondary appears to be of spectral type O9.5V. We have performed a numerical model fit to the public All Sky Automated Survey photometry, which shows that FO 15 is also an eclipsing binary. We find an orbital inclination of ∼80°. From a simultaneous light curve and radial velocity solution, we find the masses and radii of the two components to be 30 ± 1 and 16 ± 1 M⊙ and 7.5 ± 0.5 and 5.3 ± 0.5 R⊙. These radii, and hence also the luminosities, are smaller than those of normal O-type stars, but similar to recently born ZAMS O-type stars. The absolute magnitudes derived from our analysis locate FO 15 at the same distance as η Carinæ. From Chandra and XMM X-ray images, we also find that there are two close X-ray sources: one coincident with FO 15 and the other one without optical counterpart. The latter seems to be a highly variable source, presumably due to a pre-main-sequence stellar neighbour of FO 15. |
publishDate |
2006 |
dc.date.none.fl_str_mv |
2006 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Articulo http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
http://sedici.unlp.edu.ar/handle/10915/83104 |
url |
http://sedici.unlp.edu.ar/handle/10915/83104 |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/issn/0035-8711 info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1365-2966.2006.10046.x |
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info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) |
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http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) |
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