Optical Spectroscopy of X-Mega Targets : I. CPD -59:2635: A New Double-Lined O-Type Binary in the Carina Nebula

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...

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Detalles Bibliográficos
Autores principales:	Albacete Colombo, Juan Facundo, Morrell, Nidia Irene, Niemelä, Virpi Sinikka, Corcoran, Michael
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2001
Materias:	Ciencias Astronómicas astrofísica binaries: general; stars: early-type; stars: individual: CPD 2598 2635; open clusters and associations: individual: Trumpler 16; X-rays: stars
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/2071 http://onlinelibrary.wiley.com/doi/10.1046/j.1365-8711.2001.04497.x/pdf
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

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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: CPD 2598 2635; open clusters and associations: individual: Trumpler 16; X-rays: stars
spellingShingle	Ciencias Astronómicas astrofísica binaries: general; stars: early-type; stars: individual: CPD 2598 2635; open clusters and associations: individual: Trumpler 16; X-rays: stars Albacete Colombo, Juan Facundo Morrell, Nidia Irene Niemelä, Virpi Sinikka Corcoran, Michael Optical Spectroscopy of X-Mega Targets : I. CPD -59:2635: A New Double-Lined O-Type Binary in the Carina Nebula
topic_facet	Ciencias Astronómicas astrofísica binaries: general; stars: early-type; stars: individual: CPD 2598 2635; open clusters and associations: individual: Trumpler 16; X-rays: stars
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.
format	Articulo Articulo
author	Albacete Colombo, Juan Facundo Morrell, Nidia Irene Niemelä, Virpi Sinikka Corcoran, Michael
author_facet	Albacete Colombo, Juan Facundo Morrell, Nidia Irene Niemelä, Virpi Sinikka Corcoran, Michael
author_sort	Albacete Colombo, Juan Facundo
title	Optical Spectroscopy of X-Mega Targets : I. CPD -59:2635: A New Double-Lined O-Type Binary in the Carina Nebula
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
publishDate	2001
url	http://sedici.unlp.edu.ar/handle/10915/2071 http://onlinelibrary.wiley.com/doi/10.1046/j.1365-8711.2001.04497.x/pdf
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bdutipo_str	Repositorios
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Optical Spectroscopy of X-Mega Targets : I. CPD -59:2635: A New Double-Lined O-Type Binary in the Carina Nebula

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