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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/257107
Ver los metadatos del registro completo
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oai:ri.conicet.gov.ar:11336/257107 |
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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 Técnicas2025-09-29T09:58:36Zoai: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:34982025-09-29 09:58:36.543CONICET 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 |
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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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1844613745638113280 |
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13.070432 |