On the multiplicity of the zero-age main-sequence O star Herschel 36

We present the analysis of high-resolution optical spectroscopic observations of the zero-age main-sequence O star Herschel 36 spanning six years. This star is definitely a multiple system, with at least three components detected in its spectrum. Based on our radial-velocity (RV) study, we propose a...

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Detalles Bibliográficos
Autores principales:	Arias, Julia Inés, Barbá, Rodolfo Héctor, Gamen, Roberto Claudio, Morrell, Nidia Irene, Maíz Apellániz, Jesús, Alfaro, Emilio J., Sota, Alfredo, Walborn, Nolan Revere, Moni Bidin, Cristian
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2010
Materias:	Ciencias Astronómicas Binaries: close Stars: early-type Stars: individual (Herschel 36)
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/82458
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-82458
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 Binaries: close Stars: early-type Stars: individual (Herschel 36)
spellingShingle	Ciencias Astronómicas Binaries: close Stars: early-type Stars: individual (Herschel 36) Arias, Julia Inés Barbá, Rodolfo Héctor Gamen, Roberto Claudio Morrell, Nidia Irene Maíz Apellániz, Jesús Alfaro, Emilio J. Sota, Alfredo Walborn, Nolan Revere Moni Bidin, Cristian On the multiplicity of the zero-age main-sequence O star Herschel 36
topic_facet	Ciencias Astronómicas Binaries: close Stars: early-type Stars: individual (Herschel 36)
description	We present the analysis of high-resolution optical spectroscopic observations of the zero-age main-sequence O star Herschel 36 spanning six years. This star is definitely a multiple system, with at least three components detected in its spectrum. Based on our radial-velocity (RV) study, we propose a picture of a close massive binary and a more distant companion, most probably in wide orbit about each other. The orbital solution for the binary, whose components we identify as O9V and B0.5V, is characterized by a period of 1.5415 0.0006 days. With a spectral type O7.5V, the third body is the most luminous component of the system and also presents RV variations with a period close to 498 days. Some possible hypotheses to explain the variability are briefly addressed and further observations are suggested.
format	Articulo Articulo
author	Arias, Julia Inés Barbá, Rodolfo Héctor Gamen, Roberto Claudio Morrell, Nidia Irene Maíz Apellániz, Jesús Alfaro, Emilio J. Sota, Alfredo Walborn, Nolan Revere Moni Bidin, Cristian
author_facet	Arias, Julia Inés Barbá, Rodolfo Héctor Gamen, Roberto Claudio Morrell, Nidia Irene Maíz Apellániz, Jesús Alfaro, Emilio J. Sota, Alfredo Walborn, Nolan Revere Moni Bidin, Cristian
author_sort	Arias, Julia Inés
title	On the multiplicity of the zero-age main-sequence O star Herschel 36
title_short	On the multiplicity of the zero-age main-sequence O star Herschel 36
title_full	On the multiplicity of the zero-age main-sequence O star Herschel 36
title_fullStr	On the multiplicity of the zero-age main-sequence O star Herschel 36
title_full_unstemmed	On the multiplicity of the zero-age main-sequence O star Herschel 36
title_sort	on the multiplicity of the zero-age main-sequence o star herschel 36
publishDate	2010
url	http://sedici.unlp.edu.ar/handle/10915/82458
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On the multiplicity of the zero-age main-sequence O star Herschel 36

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