Multi-epoch Very Long Baseline Array Observations of the Compact Wind-collision Region in the Quadruple System Cyg OB2 #5

Autores
Dzib, Sergio A.; Rodríguez, Luiis Felipe; Loinard, laurent; Mioduszewski, Amy J.; Ortiz Leon, Gisela N.; Araudo, Anabella Teresa
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We present multi-epoch Very Long Base Array observations of the compact wind-collision region in the Cyg OB2 #5 system. These observations confirm the arc-shaped morphology of the emission reported earlier. The total flux as a function of time is roughly constant when the source is "on," but falls below the detection limit as the wind-collision region approaches periastron in its orbit around the contact binary at the center of the system. In addition, at one of the "on" epochs, the flux drops to about a fifth of its average value. We suggest that this apparent variation could result from the inhomogeneity of the wind that hides part of the flux rather than from an intrinsic variation. We measured a trigonometrical parallax, for the most compact radio emission of 0.61 ± 0.22 mas, corresponding to a distance of 1.65 +0.96 –0.44 kpc, in agreement with recent trigonometrical parallaxes measured for objects in the Cygnus X complex. Using constraints on the total mass of the system and orbital parameters previously reported in the literature, we obtain two independent indirect measurements of the distance to the Cyg OB2 #5 system, both consistent with 1.3-1.4 kpc. Finally, we suggest that the companion star responsible for the wind interaction, yet undetected, is of spectral type between B0.5 and O8.
Fil: Dzib, Sergio A.. Universidad Nacional Autonoma de Mexico. Centro de Radiostronomía y Astrofísica; México
Fil: Rodríguez, Luiis Felipe. Universidad Nacional Autonoma de Mexico. Centro de Radiostronomía y Astrofísica; México. King Abdulaziz University. Astronomy Department, Faculty of Science; Arabia Saudita
Fil: Loinard, laurent. Universidad Nacional Autonoma de Mexico. Centro de Radiostronomía y Astrofísica; México. Max-Planck-Institut fur Radioastronomie; Alemania
Fil: Mioduszewski, Amy J. . National Radio Astronomy Observatory; Estados Unidos
Fil: Ortiz Leon, Gisela N.. Universidad Nacional Autonoma de Mexico. Centro de Radiostronomía y Astrofísica; México
Fil: Araudo, Anabella Teresa. Universidad Nacional Autonoma de Mexico. Centro de Radiostronomía y Astrofísica; México. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Instituto Argentino de Radioastronomia (i); Argentina
Materia
Astrometry
Non-Thermal Mechanisms
Cyg Ob2 #5
Winds
Outflows
Radiation Mechanisms
Stars
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/5841
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/5841
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repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Multi-epoch Very Long Baseline Array Observations of the Compact Wind-collision Region in the Quadruple System Cyg OB2 #5Dzib, Sergio A.Rodríguez, Luiis FelipeLoinard, laurentMioduszewski, Amy J. Ortiz Leon, Gisela N.Araudo, Anabella TeresaAstrometryNon-Thermal MechanismsCyg Ob2 #5WindsOutflowsRadiation MechanismsStarshttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We present multi-epoch Very Long Base Array observations of the compact wind-collision region in the Cyg OB2 #5 system. These observations confirm the arc-shaped morphology of the emission reported earlier. The total flux as a function of time is roughly constant when the source is "on," but falls below the detection limit as the wind-collision region approaches periastron in its orbit around the contact binary at the center of the system. In addition, at one of the "on" epochs, the flux drops to about a fifth of its average value. We suggest that this apparent variation could result from the inhomogeneity of the wind that hides part of the flux rather than from an intrinsic variation. We measured a trigonometrical parallax, for the most compact radio emission of 0.61 ± 0.22 mas, corresponding to a distance of 1.65 +0.96 –0.44 kpc, in agreement with recent trigonometrical parallaxes measured for objects in the Cygnus X complex. Using constraints on the total mass of the system and orbital parameters previously reported in the literature, we obtain two independent indirect measurements of the distance to the Cyg OB2 #5 system, both consistent with 1.3-1.4 kpc. Finally, we suggest that the companion star responsible for the wind interaction, yet undetected, is of spectral type between B0.5 and O8.Fil: Dzib, Sergio A.. Universidad Nacional Autonoma de Mexico. Centro de Radiostronomía y Astrofísica; MéxicoFil: Rodríguez, Luiis Felipe. Universidad Nacional Autonoma de Mexico. Centro de Radiostronomía y Astrofísica; México. King Abdulaziz University. Astronomy Department, Faculty of Science; Arabia SauditaFil: Loinard, laurent. Universidad Nacional Autonoma de Mexico. Centro de Radiostronomía y Astrofísica; México. Max-Planck-Institut fur Radioastronomie; AlemaniaFil: Mioduszewski, Amy J. . National Radio Astronomy Observatory; Estados UnidosFil: Ortiz Leon, Gisela N.. Universidad Nacional Autonoma de Mexico. Centro de Radiostronomía y Astrofísica; MéxicoFil: Araudo, Anabella Teresa. Universidad Nacional Autonoma de Mexico. Centro de Radiostronomía y Astrofísica; México. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Instituto Argentino de Radioastronomia (i); ArgentinaIOP Publishing2013-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/5841Dzib, Sergio A.; Rodríguez, Luiis Felipe; Loinard, laurent; Mioduszewski, Amy J. ; Ortiz Leon, Gisela N.; et al.; Multi-epoch Very Long Baseline Array Observations of the Compact Wind-collision Region in the Quadruple System Cyg OB2 #5; IOP Publishing; Astrophysical Journal; 763; 2; 2-2013; 139-1390004-637Xenginfo:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/article/10.1088/0004-637X/763/2/139info:eu-repo/semantics/altIdentifier/doi/ doi:10.1088/0004-637X/763/2/139info:eu-repo/semantics/altIdentifier/doi/info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T15:00:34Zoai:ri.conicet.gov.ar:11336/5841instacron: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:34982025-10-15 15:00:34.421CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Multi-epoch Very Long Baseline Array Observations of the Compact Wind-collision Region in the Quadruple System Cyg OB2 #5
title Multi-epoch Very Long Baseline Array Observations of the Compact Wind-collision Region in the Quadruple System Cyg OB2 #5
spellingShingle Multi-epoch Very Long Baseline Array Observations of the Compact Wind-collision Region in the Quadruple System Cyg OB2 #5
Dzib, Sergio A.
Astrometry
Non-Thermal Mechanisms
Cyg Ob2 #5
Winds
Outflows
Radiation Mechanisms
Stars
title_short Multi-epoch Very Long Baseline Array Observations of the Compact Wind-collision Region in the Quadruple System Cyg OB2 #5
title_full Multi-epoch Very Long Baseline Array Observations of the Compact Wind-collision Region in the Quadruple System Cyg OB2 #5
title_fullStr Multi-epoch Very Long Baseline Array Observations of the Compact Wind-collision Region in the Quadruple System Cyg OB2 #5
title_full_unstemmed Multi-epoch Very Long Baseline Array Observations of the Compact Wind-collision Region in the Quadruple System Cyg OB2 #5
title_sort Multi-epoch Very Long Baseline Array Observations of the Compact Wind-collision Region in the Quadruple System Cyg OB2 #5
dc.creator.none.fl_str_mv Dzib, Sergio A.
Rodríguez, Luiis Felipe
Loinard, laurent
Mioduszewski, Amy J.
Ortiz Leon, Gisela N.
Araudo, Anabella Teresa
author Dzib, Sergio A.
author_facet Dzib, Sergio A.
Rodríguez, Luiis Felipe
Loinard, laurent
Mioduszewski, Amy J.
Ortiz Leon, Gisela N.
Araudo, Anabella Teresa
author_role author
author2 Rodríguez, Luiis Felipe
Loinard, laurent
Mioduszewski, Amy J.
Ortiz Leon, Gisela N.
Araudo, Anabella Teresa
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Astrometry
Non-Thermal Mechanisms
Cyg Ob2 #5
Winds
Outflows
Radiation Mechanisms
Stars
topic Astrometry
Non-Thermal Mechanisms
Cyg Ob2 #5
Winds
Outflows
Radiation Mechanisms
Stars
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We present multi-epoch Very Long Base Array observations of the compact wind-collision region in the Cyg OB2 #5 system. These observations confirm the arc-shaped morphology of the emission reported earlier. The total flux as a function of time is roughly constant when the source is "on," but falls below the detection limit as the wind-collision region approaches periastron in its orbit around the contact binary at the center of the system. In addition, at one of the "on" epochs, the flux drops to about a fifth of its average value. We suggest that this apparent variation could result from the inhomogeneity of the wind that hides part of the flux rather than from an intrinsic variation. We measured a trigonometrical parallax, for the most compact radio emission of 0.61 ± 0.22 mas, corresponding to a distance of 1.65 +0.96 –0.44 kpc, in agreement with recent trigonometrical parallaxes measured for objects in the Cygnus X complex. Using constraints on the total mass of the system and orbital parameters previously reported in the literature, we obtain two independent indirect measurements of the distance to the Cyg OB2 #5 system, both consistent with 1.3-1.4 kpc. Finally, we suggest that the companion star responsible for the wind interaction, yet undetected, is of spectral type between B0.5 and O8.
Fil: Dzib, Sergio A.. Universidad Nacional Autonoma de Mexico. Centro de Radiostronomía y Astrofísica; México
Fil: Rodríguez, Luiis Felipe. Universidad Nacional Autonoma de Mexico. Centro de Radiostronomía y Astrofísica; México. King Abdulaziz University. Astronomy Department, Faculty of Science; Arabia Saudita
Fil: Loinard, laurent. Universidad Nacional Autonoma de Mexico. Centro de Radiostronomía y Astrofísica; México. Max-Planck-Institut fur Radioastronomie; Alemania
Fil: Mioduszewski, Amy J. . National Radio Astronomy Observatory; Estados Unidos
Fil: Ortiz Leon, Gisela N.. Universidad Nacional Autonoma de Mexico. Centro de Radiostronomía y Astrofísica; México
Fil: Araudo, Anabella Teresa. Universidad Nacional Autonoma de Mexico. Centro de Radiostronomía y Astrofísica; México. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Instituto Argentino de Radioastronomia (i); Argentina
description We present multi-epoch Very Long Base Array observations of the compact wind-collision region in the Cyg OB2 #5 system. These observations confirm the arc-shaped morphology of the emission reported earlier. The total flux as a function of time is roughly constant when the source is "on," but falls below the detection limit as the wind-collision region approaches periastron in its orbit around the contact binary at the center of the system. In addition, at one of the "on" epochs, the flux drops to about a fifth of its average value. We suggest that this apparent variation could result from the inhomogeneity of the wind that hides part of the flux rather than from an intrinsic variation. We measured a trigonometrical parallax, for the most compact radio emission of 0.61 ± 0.22 mas, corresponding to a distance of 1.65 +0.96 –0.44 kpc, in agreement with recent trigonometrical parallaxes measured for objects in the Cygnus X complex. Using constraints on the total mass of the system and orbital parameters previously reported in the literature, we obtain two independent indirect measurements of the distance to the Cyg OB2 #5 system, both consistent with 1.3-1.4 kpc. Finally, we suggest that the companion star responsible for the wind interaction, yet undetected, is of spectral type between B0.5 and O8.
publishDate 2013
dc.date.none.fl_str_mv 2013-02
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/11336/5841
Dzib, Sergio A.; Rodríguez, Luiis Felipe; Loinard, laurent; Mioduszewski, Amy J. ; Ortiz Leon, Gisela N.; et al.; Multi-epoch Very Long Baseline Array Observations of the Compact Wind-collision Region in the Quadruple System Cyg OB2 #5; IOP Publishing; Astrophysical Journal; 763; 2; 2-2013; 139-139
0004-637X
url http://hdl.handle.net/11336/5841
identifier_str_mv Dzib, Sergio A.; Rodríguez, Luiis Felipe; Loinard, laurent; Mioduszewski, Amy J. ; Ortiz Leon, Gisela N.; et al.; Multi-epoch Very Long Baseline Array Observations of the Compact Wind-collision Region in the Quadruple System Cyg OB2 #5; IOP Publishing; Astrophysical Journal; 763; 2; 2-2013; 139-139
0004-637X
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/article/10.1088/0004-637X/763/2/139
info:eu-repo/semantics/altIdentifier/doi/ doi:10.1088/0004-637X/763/2/139
info:eu-repo/semantics/altIdentifier/doi/
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv IOP Publishing
publisher.none.fl_str_mv IOP Publishing
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 13.221938

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