A polarimetric view of the open cluster Lyngå 6 and the Cepheid TW Normæ

Autores
Orsatti, Ana María; Vega, Ema Irene; Marraco, Hugo Gustavo
Año de publicación
2001
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We present UBVRI polarimetric observations of stars belonging to the small open cluster Lyngå 6 and of TW Nor, a Cepheid which can be seen near the center of the grouping. The wavelength of maximum polarization is computed and then analyzed in the context of its relation to the optical properties and characteristics particle size distribution of the grains responsible for the polarization. The amount and direction of linear polarization is also computed. Results indicate a mean polarization efficiency close to the value found for the interstellar medium. Two out of seven members of Lyngå 6 present indications of intrinsic polarization in their measures. We conclude that part of the polarization detected in the light from members of the cluster comes from a dust cloud located in the Local arm, at a distance of about 1 kpc. In general, polarization measurements do not support the membership of TW Nor to Lyngå 6.
Facultad de Ciencias Astronómicas y Geofísicas
Instituto de Astrofísica de La Plata
Materia
Ciencias Astronómicas
Cepheids
ISM: dust, extinction
Open clusters and associations: individual (Lyngå 6)
Stars: individual (TW Nor)
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:10915/83590

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oai_identifier_str oai:sedici.unlp.edu.ar:10915/83590
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repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling A polarimetric view of the open cluster Lyngå 6 and the Cepheid TW NormæOrsatti, Ana MaríaVega, Ema IreneMarraco, Hugo GustavoCiencias AstronómicasCepheidsISM: dust, extinctionOpen clusters and associations: individual (Lyngå 6)Stars: individual (TW Nor)We present UBVRI polarimetric observations of stars belonging to the small open cluster Lyngå 6 and of TW Nor, a Cepheid which can be seen near the center of the grouping. The wavelength of maximum polarization is computed and then analyzed in the context of its relation to the optical properties and characteristics particle size distribution of the grains responsible for the polarization. The amount and direction of linear polarization is also computed. Results indicate a mean polarization efficiency close to the value found for the interstellar medium. Two out of seven members of Lyngå 6 present indications of intrinsic polarization in their measures. We conclude that part of the polarization detected in the light from members of the cluster comes from a dust cloud located in the Local arm, at a distance of about 1 kpc. In general, polarization measurements do not support the membership of TW Nor to Lyngå 6.Facultad de Ciencias Astronómicas y GeofísicasInstituto de Astrofísica de La Plata2001-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf130-136http://sedici.unlp.edu.ar/handle/10915/83590enginfo:eu-repo/semantics/altIdentifier/issn/0004-6361info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361:20011350info: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:UNLP2025-09-29T11:15:50Zoai:sedici.unlp.edu.ar:10915/83590Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:15:50.999SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv A polarimetric view of the open cluster Lyngå 6 and the Cepheid TW Normæ
title A polarimetric view of the open cluster Lyngå 6 and the Cepheid TW Normæ
spellingShingle A polarimetric view of the open cluster Lyngå 6 and the Cepheid TW Normæ
Orsatti, Ana María
Ciencias Astronómicas
Cepheids
ISM: dust, extinction
Open clusters and associations: individual (Lyngå 6)
Stars: individual (TW Nor)
title_short A polarimetric view of the open cluster Lyngå 6 and the Cepheid TW Normæ
title_full A polarimetric view of the open cluster Lyngå 6 and the Cepheid TW Normæ
title_fullStr A polarimetric view of the open cluster Lyngå 6 and the Cepheid TW Normæ
title_full_unstemmed A polarimetric view of the open cluster Lyngå 6 and the Cepheid TW Normæ
title_sort A polarimetric view of the open cluster Lyngå 6 and the Cepheid TW Normæ
dc.creator.none.fl_str_mv Orsatti, Ana María
Vega, Ema Irene
Marraco, Hugo Gustavo
author Orsatti, Ana María
author_facet Orsatti, Ana María
Vega, Ema Irene
Marraco, Hugo Gustavo
author_role author
author2 Vega, Ema Irene
Marraco, Hugo Gustavo
author2_role author
author
dc.subject.none.fl_str_mv Ciencias Astronómicas
Cepheids
ISM: dust, extinction
Open clusters and associations: individual (Lyngå 6)
Stars: individual (TW Nor)
topic Ciencias Astronómicas
Cepheids
ISM: dust, extinction
Open clusters and associations: individual (Lyngå 6)
Stars: individual (TW Nor)
dc.description.none.fl_txt_mv We present UBVRI polarimetric observations of stars belonging to the small open cluster Lyngå 6 and of TW Nor, a Cepheid which can be seen near the center of the grouping. The wavelength of maximum polarization is computed and then analyzed in the context of its relation to the optical properties and characteristics particle size distribution of the grains responsible for the polarization. The amount and direction of linear polarization is also computed. Results indicate a mean polarization efficiency close to the value found for the interstellar medium. Two out of seven members of Lyngå 6 present indications of intrinsic polarization in their measures. We conclude that part of the polarization detected in the light from members of the cluster comes from a dust cloud located in the Local arm, at a distance of about 1 kpc. In general, polarization measurements do not support the membership of TW Nor to Lyngå 6.
Facultad de Ciencias Astronómicas y Geofísicas
Instituto de Astrofísica de La Plata
description We present UBVRI polarimetric observations of stars belonging to the small open cluster Lyngå 6 and of TW Nor, a Cepheid which can be seen near the center of the grouping. The wavelength of maximum polarization is computed and then analyzed in the context of its relation to the optical properties and characteristics particle size distribution of the grains responsible for the polarization. The amount and direction of linear polarization is also computed. Results indicate a mean polarization efficiency close to the value found for the interstellar medium. Two out of seven members of Lyngå 6 present indications of intrinsic polarization in their measures. We conclude that part of the polarization detected in the light from members of the cluster comes from a dust cloud located in the Local arm, at a distance of about 1 kpc. In general, polarization measurements do not support the membership of TW Nor to Lyngå 6.
publishDate 2001
dc.date.none.fl_str_mv 2001-12
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/10915/83590
url http://sedici.unlp.edu.ar/handle/10915/83590
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0004-6361
info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361:20011350
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
130-136
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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