The highly polarized open cluster Trumpler 27

Autores
Feinstein Baigorri, Carlos; Baume, Gustavo Luis; Vázquez, Rubén Ángel; Niemelä, Virpi Sinikka; Cerruti, Miguel Ángel
Año de publicación
2000
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We have carried out multicolor linear polarimetry (U BV RI) of the brightest stars in the area of the open cluster Trumpler 27. Our data show a high level of polarization in the stellar light with a considerable dispersion, from P = 4% to P = 9.5%. The polarization vectors of the cluster members appear to be aligned. Foreground polarization was estimated from the data of some nonmember objects, for which two different components were resolved: the first one associated with a dust cloud close to the Sun producing Pλmax = 1.3% and θ = 146°, and a second component, the main source of polarization for the cluster members, originating in another dust cloud, which polarizes the light in the direction of θ = 29°.5. From a detailed analysis, we found that the two components have associated values EB-V < 0.45 for the first one and EB-V > 0.75 for the other. Due the difference in the orientation of both polarization vectors, almost 90° (180° at the Stokes representation), the first cloud (θ ∼ 146°) depolarizes the light strongly polarized by the second one (θ ∼ 29°.5).
Facultad de Ciencias Astronómicas y Geofísicas
Materia
Ciencias Astronómicas
Dust, extinction
Open clusters and associations: individual (Trumpler 27)
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/84909

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oai_identifier_str oai:sedici.unlp.edu.ar:10915/84909
network_acronym_str SEDICI
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network_name_str SEDICI (UNLP)
spelling The highly polarized open cluster Trumpler 27Feinstein Baigorri, CarlosBaume, Gustavo LuisVázquez, Rubén ÁngelNiemelä, Virpi SinikkaCerruti, Miguel ÁngelCiencias AstronómicasDust, extinctionOpen clusters and associations: individual (Trumpler 27)We have carried out multicolor linear polarimetry (U BV RI) of the brightest stars in the area of the open cluster Trumpler 27. Our data show a high level of polarization in the stellar light with a considerable dispersion, from P = 4% to P = 9.5%. The polarization vectors of the cluster members appear to be aligned. Foreground polarization was estimated from the data of some nonmember objects, for which two different components were resolved: the first one associated with a dust cloud close to the Sun producing P<SUB>λmax</SUB> = 1.3% and θ = 146°, and a second component, the main source of polarization for the cluster members, originating in another dust cloud, which polarizes the light in the direction of θ = 29°.5. From a detailed analysis, we found that the two components have associated values E<SUB>B-V</SUB> < 0.45 for the first one and E<SUB>B-V</SUB> > 0.75 for the other. Due the difference in the orientation of both polarization vectors, almost 90° (180° at the Stokes representation), the first cloud (θ ∼ 146°) depolarizes the light strongly polarized by the second one (θ ∼ 29°.5).Facultad de Ciencias Astronómicas y Geofísicas2000info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf1906-1912http://sedici.unlp.edu.ar/handle/10915/84909enginfo:eu-repo/semantics/altIdentifier/issn/0004-6256info:eu-repo/semantics/altIdentifier/doi/10.1086/301562info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:16:19Zoai:sedici.unlp.edu.ar:10915/84909Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:16:20.188SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv The highly polarized open cluster Trumpler 27
title The highly polarized open cluster Trumpler 27
spellingShingle The highly polarized open cluster Trumpler 27
Feinstein Baigorri, Carlos
Ciencias Astronómicas
Dust, extinction
Open clusters and associations: individual (Trumpler 27)
title_short The highly polarized open cluster Trumpler 27
title_full The highly polarized open cluster Trumpler 27
title_fullStr The highly polarized open cluster Trumpler 27
title_full_unstemmed The highly polarized open cluster Trumpler 27
title_sort The highly polarized open cluster Trumpler 27
dc.creator.none.fl_str_mv Feinstein Baigorri, Carlos
Baume, Gustavo Luis
Vázquez, Rubén Ángel
Niemelä, Virpi Sinikka
Cerruti, Miguel Ángel
author Feinstein Baigorri, Carlos
author_facet Feinstein Baigorri, Carlos
Baume, Gustavo Luis
Vázquez, Rubén Ángel
Niemelä, Virpi Sinikka
Cerruti, Miguel Ángel
author_role author
author2 Baume, Gustavo Luis
Vázquez, Rubén Ángel
Niemelä, Virpi Sinikka
Cerruti, Miguel Ángel
author2_role author
author
author
author
dc.subject.none.fl_str_mv Ciencias Astronómicas
Dust, extinction
Open clusters and associations: individual (Trumpler 27)
topic Ciencias Astronómicas
Dust, extinction
Open clusters and associations: individual (Trumpler 27)
dc.description.none.fl_txt_mv We have carried out multicolor linear polarimetry (U BV RI) of the brightest stars in the area of the open cluster Trumpler 27. Our data show a high level of polarization in the stellar light with a considerable dispersion, from P = 4% to P = 9.5%. The polarization vectors of the cluster members appear to be aligned. Foreground polarization was estimated from the data of some nonmember objects, for which two different components were resolved: the first one associated with a dust cloud close to the Sun producing P<SUB>λmax</SUB> = 1.3% and θ = 146°, and a second component, the main source of polarization for the cluster members, originating in another dust cloud, which polarizes the light in the direction of θ = 29°.5. From a detailed analysis, we found that the two components have associated values E<SUB>B-V</SUB> < 0.45 for the first one and E<SUB>B-V</SUB> > 0.75 for the other. Due the difference in the orientation of both polarization vectors, almost 90° (180° at the Stokes representation), the first cloud (θ ∼ 146°) depolarizes the light strongly polarized by the second one (θ ∼ 29°.5).
Facultad de Ciencias Astronómicas y Geofísicas
description We have carried out multicolor linear polarimetry (U BV RI) of the brightest stars in the area of the open cluster Trumpler 27. Our data show a high level of polarization in the stellar light with a considerable dispersion, from P = 4% to P = 9.5%. The polarization vectors of the cluster members appear to be aligned. Foreground polarization was estimated from the data of some nonmember objects, for which two different components were resolved: the first one associated with a dust cloud close to the Sun producing P<SUB>λmax</SUB> = 1.3% and θ = 146°, and a second component, the main source of polarization for the cluster members, originating in another dust cloud, which polarizes the light in the direction of θ = 29°.5. From a detailed analysis, we found that the two components have associated values E<SUB>B-V</SUB> < 0.45 for the first one and E<SUB>B-V</SUB> > 0.75 for the other. Due the difference in the orientation of both polarization vectors, almost 90° (180° at the Stokes representation), the first cloud (θ ∼ 146°) depolarizes the light strongly polarized by the second one (θ ∼ 29°.5).
publishDate 2000
dc.date.none.fl_str_mv 2000
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
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://sedici.unlp.edu.ar/handle/10915/84909
url http://sedici.unlp.edu.ar/handle/10915/84909
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0004-6256
info:eu-repo/semantics/altIdentifier/doi/10.1086/301562
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
1906-1912
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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