Detection of faint secondary companions in spectroscopic binaries

Autores
Gonzalez, Jorge Federico; Martinez, Cristian Israel; Alejo, Antonio Damian
Año de publicación
2024
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Context. Most known spectroscopic binaries are detected through the variation in the radial velocity of the primary star, while thespectral features of the secondary companion remain hidden in the noise.Aims. We present a novel technique for the spectroscopic detection of low-luminosity secondary companions of binary stars. Themain goal is to estimate the mass ratio even when the radial velocity of the secondary cannot be measured in individual spectra.Methods. The method aims to bring together all the spectral information of the secondary component into one single feature. In afirst step, a spectral disentangling technique is used in an automatic way for a grid of possible values of the mass ratio. Then, theresulting series of secondary component spectra are compared with a grid of synthetic templates with a technique inspired by spectralcross-correlations. By optimizing a function indicative of the significance of the secondary detection, the mass ratio and an estimateof effective temperature are derived.Results. We apply our method to different types of objects and observational datasets: three single-lined spectroscopic binaries inthe open cluster Blanco 1 observed at mid-spectral resolution, an early-type binary in the open cluster NGC 2362, and PX Vir, anF-type binary observed at high resolution for which the secondary companion had been detected in the infrared but not in the opticalspectral range. It is shown that from standard-quality spectral datasets it is possible to detect the secondary star in systems in whichthe secondary contributes less than 0.5–1.0% of the total flux.
Fil: Gonzalez, Jorge Federico. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio. Universidad Nacional de San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio; Argentina
Fil: Martinez, Cristian Israel. Observatorio Astronómico Félix Aguilar; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio. Universidad Nacional de San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio; Argentina
Fil: Alejo, Antonio Damian. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio. Universidad Nacional de San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio; Argentina
Materia
methods: data analysis
techniques: spectroscopic
binaries: spectroscopic
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/257107
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Detection of faint secondary companions in spectroscopic binariesGonzalez, Jorge FedericoMartinez, Cristian IsraelAlejo, Antonio Damianmethods: data analysistechniques: spectroscopicbinaries: spectroscopichttps://purl.org/becyt/ford/1.7https://purl.org/becyt/ford/1Context. Most known spectroscopic binaries are detected through the variation in the radial velocity of the primary star, while thespectral features of the secondary companion remain hidden in the noise.Aims. We present a novel technique for the spectroscopic detection of low-luminosity secondary companions of binary stars. Themain goal is to estimate the mass ratio even when the radial velocity of the secondary cannot be measured in individual spectra.Methods. The method aims to bring together all the spectral information of the secondary component into one single feature. In afirst step, a spectral disentangling technique is used in an automatic way for a grid of possible values of the mass ratio. Then, theresulting series of secondary component spectra are compared with a grid of synthetic templates with a technique inspired by spectralcross-correlations. By optimizing a function indicative of the significance of the secondary detection, the mass ratio and an estimateof effective temperature are derived.Results. We apply our method to different types of objects and observational datasets: three single-lined spectroscopic binaries inthe open cluster Blanco 1 observed at mid-spectral resolution, an early-type binary in the open cluster NGC 2362, and PX Vir, anF-type binary observed at high resolution for which the secondary companion had been detected in the infrared but not in the opticalspectral range. It is shown that from standard-quality spectral datasets it is possible to detect the secondary star in systems in whichthe secondary contributes less than 0.5–1.0% of the total flux.Fil: Gonzalez, Jorge Federico. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio. Universidad Nacional de San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio; ArgentinaFil: Martinez, Cristian Israel. Observatorio Astronómico Félix Aguilar; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio. Universidad Nacional de San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio; ArgentinaFil: Alejo, Antonio Damian. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio. Universidad Nacional de San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio; ArgentinaEDP Sciences2024-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/257107Gonzalez, Jorge Federico; Martinez, Cristian Israel; Alejo, Antonio Damian; Detection of faint secondary companions in spectroscopic binaries; EDP Sciences; Astronomy and Astrophysics; 690; 10-2024; 1-10; A1240004-6361CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/10.1051/0004-6361/202451405info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/202451405info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:27:57Zoai:ri.conicet.gov.ar:11336/257107instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-22 11:27:57.788CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Detection of faint secondary companions in spectroscopic binaries
title Detection of faint secondary companions in spectroscopic binaries
spellingShingle Detection of faint secondary companions in spectroscopic binaries
Gonzalez, Jorge Federico
methods: data analysis
techniques: spectroscopic
binaries: spectroscopic
title_short Detection of faint secondary companions in spectroscopic binaries
title_full Detection of faint secondary companions in spectroscopic binaries
title_fullStr Detection of faint secondary companions in spectroscopic binaries
title_full_unstemmed Detection of faint secondary companions in spectroscopic binaries
title_sort Detection of faint secondary companions in spectroscopic binaries
dc.creator.none.fl_str_mv Gonzalez, Jorge Federico
Martinez, Cristian Israel
Alejo, Antonio Damian
author Gonzalez, Jorge Federico
author_facet Gonzalez, Jorge Federico
Martinez, Cristian Israel
Alejo, Antonio Damian
author_role author
author2 Martinez, Cristian Israel
Alejo, Antonio Damian
author2_role author
author
dc.subject.none.fl_str_mv methods: data analysis
techniques: spectroscopic
binaries: spectroscopic
topic methods: data analysis
techniques: spectroscopic
binaries: spectroscopic
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.7
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Context. Most known spectroscopic binaries are detected through the variation in the radial velocity of the primary star, while thespectral features of the secondary companion remain hidden in the noise.Aims. We present a novel technique for the spectroscopic detection of low-luminosity secondary companions of binary stars. Themain goal is to estimate the mass ratio even when the radial velocity of the secondary cannot be measured in individual spectra.Methods. The method aims to bring together all the spectral information of the secondary component into one single feature. In afirst step, a spectral disentangling technique is used in an automatic way for a grid of possible values of the mass ratio. Then, theresulting series of secondary component spectra are compared with a grid of synthetic templates with a technique inspired by spectralcross-correlations. By optimizing a function indicative of the significance of the secondary detection, the mass ratio and an estimateof effective temperature are derived.Results. We apply our method to different types of objects and observational datasets: three single-lined spectroscopic binaries inthe open cluster Blanco 1 observed at mid-spectral resolution, an early-type binary in the open cluster NGC 2362, and PX Vir, anF-type binary observed at high resolution for which the secondary companion had been detected in the infrared but not in the opticalspectral range. It is shown that from standard-quality spectral datasets it is possible to detect the secondary star in systems in whichthe secondary contributes less than 0.5–1.0% of the total flux.
Fil: Gonzalez, Jorge Federico. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio. Universidad Nacional de San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio; Argentina
Fil: Martinez, Cristian Israel. Observatorio Astronómico Félix Aguilar; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio. Universidad Nacional de San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio; Argentina
Fil: Alejo, Antonio Damian. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio. Universidad Nacional de San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio; Argentina
description Context. Most known spectroscopic binaries are detected through the variation in the radial velocity of the primary star, while thespectral features of the secondary companion remain hidden in the noise.Aims. We present a novel technique for the spectroscopic detection of low-luminosity secondary companions of binary stars. Themain goal is to estimate the mass ratio even when the radial velocity of the secondary cannot be measured in individual spectra.Methods. The method aims to bring together all the spectral information of the secondary component into one single feature. In afirst step, a spectral disentangling technique is used in an automatic way for a grid of possible values of the mass ratio. Then, theresulting series of secondary component spectra are compared with a grid of synthetic templates with a technique inspired by spectralcross-correlations. By optimizing a function indicative of the significance of the secondary detection, the mass ratio and an estimateof effective temperature are derived.Results. We apply our method to different types of objects and observational datasets: three single-lined spectroscopic binaries inthe open cluster Blanco 1 observed at mid-spectral resolution, an early-type binary in the open cluster NGC 2362, and PX Vir, anF-type binary observed at high resolution for which the secondary companion had been detected in the infrared but not in the opticalspectral range. It is shown that from standard-quality spectral datasets it is possible to detect the secondary star in systems in whichthe secondary contributes less than 0.5–1.0% of the total flux.
publishDate 2024
dc.date.none.fl_str_mv 2024-10
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
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://hdl.handle.net/11336/257107
Gonzalez, Jorge Federico; Martinez, Cristian Israel; Alejo, Antonio Damian; Detection of faint secondary companions in spectroscopic binaries; EDP Sciences; Astronomy and Astrophysics; 690; 10-2024; 1-10; A124
0004-6361
CONICET Digital
CONICET
url http://hdl.handle.net/11336/257107
identifier_str_mv Gonzalez, Jorge Federico; Martinez, Cristian Israel; Alejo, Antonio Damian; Detection of faint secondary companions in spectroscopic binaries; EDP Sciences; Astronomy and Astrophysics; 690; 10-2024; 1-10; A124
0004-6361
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/10.1051/0004-6361/202451405
info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/202451405
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv EDP Sciences
publisher.none.fl_str_mv EDP Sciences
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 12.982451

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