Optical multicolor polarization observations in the region of the open cluster NGC 5749

Autores
Vergne, María Marcela; Feinstein Baigorri, Carlos; Martínez, Rubén Enrique
Año de publicación
2007
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We present (UBVRI) multicolor linear polarimetric data for 31 of the brightest stars in the area of the open cluster NGC 5749 considered to study the properties of the interstellar medium (ISM) towards the cluster. Our data yield a mean polarization percentage of Pv ∼ 1.7%, close to the polarization value produced by the ISM with normal efficiency (P(%) = 3.5E (B-V)0.8) for a mean color excess of EB-V = 0.42. The mean angle of polarization vectors, θ = 74°, agrees quite well with the expected angle produced by dust particles aligned in the direction of the galactic disk (and the magnetic field) in the region. Our analysis indicates that the visual absorption affecting the stars in NGC 5749 is partially produced by a dust layer located up to 300 pc from the Sun and also by a second layer of dust closer to the cluster (located at least at 700 pc). The observed photometry and our polarization data are consistent with the existence of dust within the cluster. We also show in this work how polarimetry could be an excellent technique for identifying nonmember stars.
Facultad de Ciencias Astronómicas y Geofísicas
Materia
Ciencias Astronómicas
ISM: dust, extinction
Open clusters and associations: individual: NGC 5749
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:10915/82966
Acceder
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network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Optical multicolor polarization observations in the region of the open cluster NGC 5749Vergne, María MarcelaFeinstein Baigorri, CarlosMartínez, Rubén EnriqueCiencias AstronómicasISM: dust, extinctionOpen clusters and associations: individual: NGC 5749We present (UBVRI) multicolor linear polarimetric data for 31 of the brightest stars in the area of the open cluster NGC 5749 considered to study the properties of the interstellar medium (ISM) towards the cluster. Our data yield a mean polarization percentage of Pv ∼ 1.7%, close to the polarization value produced by the ISM with normal efficiency (P(%) = 3.5E (B-V)0.8) for a mean color excess of EB-V = 0.42. The mean angle of polarization vectors, θ = 74°, agrees quite well with the expected angle produced by dust particles aligned in the direction of the galactic disk (and the magnetic field) in the region. Our analysis indicates that the visual absorption affecting the stars in NGC 5749 is partially produced by a dust layer located up to 300 pc from the Sun and also by a second layer of dust closer to the cluster (located at least at 700 pc). The observed photometry and our polarization data are consistent with the existence of dust within the cluster. We also show in this work how polarimetry could be an excellent technique for identifying nonmember stars.Facultad de Ciencias Astronómicas y Geofísicas2007info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf621-626http://sedici.unlp.edu.ar/handle/10915/82966enginfo:eu-repo/semantics/altIdentifier/issn/0004-6361info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361:20042124info: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:UNLP2025-09-29T11:15:45Zoai:sedici.unlp.edu.ar:10915/82966Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:15:45.875SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Optical multicolor polarization observations in the region of the open cluster NGC 5749
title Optical multicolor polarization observations in the region of the open cluster NGC 5749
spellingShingle Optical multicolor polarization observations in the region of the open cluster NGC 5749
Vergne, María Marcela
Ciencias Astronómicas
ISM: dust, extinction
Open clusters and associations: individual: NGC 5749
title_short Optical multicolor polarization observations in the region of the open cluster NGC 5749
title_full Optical multicolor polarization observations in the region of the open cluster NGC 5749
title_fullStr Optical multicolor polarization observations in the region of the open cluster NGC 5749
title_full_unstemmed Optical multicolor polarization observations in the region of the open cluster NGC 5749
title_sort Optical multicolor polarization observations in the region of the open cluster NGC 5749
dc.creator.none.fl_str_mv Vergne, María Marcela
Feinstein Baigorri, Carlos
Martínez, Rubén Enrique
author Vergne, María Marcela
author_facet Vergne, María Marcela
Feinstein Baigorri, Carlos
Martínez, Rubén Enrique
author_role author
author2 Feinstein Baigorri, Carlos
Martínez, Rubén Enrique
author2_role author
author
dc.subject.none.fl_str_mv Ciencias Astronómicas
ISM: dust, extinction
Open clusters and associations: individual: NGC 5749
topic Ciencias Astronómicas
ISM: dust, extinction
Open clusters and associations: individual: NGC 5749
dc.description.none.fl_txt_mv We present (UBVRI) multicolor linear polarimetric data for 31 of the brightest stars in the area of the open cluster NGC 5749 considered to study the properties of the interstellar medium (ISM) towards the cluster. Our data yield a mean polarization percentage of Pv ∼ 1.7%, close to the polarization value produced by the ISM with normal efficiency (P(%) = 3.5E (B-V)0.8) for a mean color excess of EB-V = 0.42. The mean angle of polarization vectors, θ = 74°, agrees quite well with the expected angle produced by dust particles aligned in the direction of the galactic disk (and the magnetic field) in the region. Our analysis indicates that the visual absorption affecting the stars in NGC 5749 is partially produced by a dust layer located up to 300 pc from the Sun and also by a second layer of dust closer to the cluster (located at least at 700 pc). The observed photometry and our polarization data are consistent with the existence of dust within the cluster. We also show in this work how polarimetry could be an excellent technique for identifying nonmember stars.
Facultad de Ciencias Astronómicas y Geofísicas
description We present (UBVRI) multicolor linear polarimetric data for 31 of the brightest stars in the area of the open cluster NGC 5749 considered to study the properties of the interstellar medium (ISM) towards the cluster. Our data yield a mean polarization percentage of Pv ∼ 1.7%, close to the polarization value produced by the ISM with normal efficiency (P(%) = 3.5E (B-V)0.8) for a mean color excess of EB-V = 0.42. The mean angle of polarization vectors, θ = 74°, agrees quite well with the expected angle produced by dust particles aligned in the direction of the galactic disk (and the magnetic field) in the region. Our analysis indicates that the visual absorption affecting the stars in NGC 5749 is partially produced by a dust layer located up to 300 pc from the Sun and also by a second layer of dust closer to the cluster (located at least at 700 pc). The observed photometry and our polarization data are consistent with the existence of dust within the cluster. We also show in this work how polarimetry could be an excellent technique for identifying nonmember stars.
publishDate 2007
dc.date.none.fl_str_mv 2007
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/10915/82966
url http://sedici.unlp.edu.ar/handle/10915/82966
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/10.1051/0004-6361:20042124
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
621-626
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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