Polarimetry in the outskirts of NGC 6611

Autores
Orsatti, Ana Maria; Vega, Ema Irene; Marraco, Hugo Gustavo
Año de publicación
2006
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We present new polarimetric UBVRI observations of 25 stars in the direction of the halo of NGC 6611, the rich stellar open cluster embedded in an ionized hydrogen complex (M16). Our plan is to characterize the interstellar material (ISM) associated with halo stars in order to make a comparison with the ISM dusty core characteristics that resulted from a previous investigation by the same authors. Of the halo stars, 47% (8 out of 17) show indications of intrinsic polarization in their light, similar to what was found for core stars (50%). We have identified the presence of nearby dust clouds located on the Local arm that produce a mean polarization of about 1%; a value = 0.61 ± 0.07 μm, which is slightly larger than that of the average ISM; and a mean direction of the polarization vectors of = 81fdg9 ± 1fdg8. The ISM associated with the halo region has similar to the general interstellar medium (0.55 ± 0.07 μm). The observed polarizations show a gradual increase from halo ( = 1.93% ± 0.3%) to core ( = 3.19% ± 0.63%). Position angles of the e-vector for both groups are generally similar, but there exists a slight difference in mean direction between them that is within the errors. We have also found that the halo stars are possibly represented by Whittet & van Breda's relationship, while in the cluster's core the dust does not fulfill the above-mentioned relationship. As a conclusion, we cannot find any clear difference between core and halo dust characteristics, with the exception of , which may suggest a change in dust size.
Fil: Orsatti, Ana Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica la Plata; Argentina
Fil: Vega, Ema Irene. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Marraco, Hugo Gustavo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Materia
Dust
Interstellar Medium
Open Clusters
Polarimetry
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:11336/22032

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network_name_str CONICET Digital (CONICET)
spelling Polarimetry in the outskirts of NGC 6611Orsatti, Ana MariaVega, Ema IreneMarraco, Hugo GustavoDustInterstellar MediumOpen ClustersPolarimetryhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We present new polarimetric UBVRI observations of 25 stars in the direction of the halo of NGC 6611, the rich stellar open cluster embedded in an ionized hydrogen complex (M16). Our plan is to characterize the interstellar material (ISM) associated with halo stars in order to make a comparison with the ISM dusty core characteristics that resulted from a previous investigation by the same authors. Of the halo stars, 47% (8 out of 17) show indications of intrinsic polarization in their light, similar to what was found for core stars (50%). We have identified the presence of nearby dust clouds located on the Local arm that produce a mean polarization of about 1%; a value = 0.61 ± 0.07 μm, which is slightly larger than that of the average ISM; and a mean direction of the polarization vectors of = 81fdg9 ± 1fdg8. The ISM associated with the halo region has similar to the general interstellar medium (0.55 ± 0.07 μm). The observed polarizations show a gradual increase from halo ( = 1.93% ± 0.3%) to core ( = 3.19% ± 0.63%). Position angles of the e-vector for both groups are generally similar, but there exists a slight difference in mean direction between them that is within the errors. We have also found that the halo stars are possibly represented by Whittet & van Breda's relationship, while in the cluster's core the dust does not fulfill the above-mentioned relationship. As a conclusion, we cannot find any clear difference between core and halo dust characteristics, with the exception of , which may suggest a change in dust size.Fil: Orsatti, Ana Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica la Plata; ArgentinaFil: Vega, Ema Irene. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Marraco, Hugo Gustavo. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaIOP Publishing2006-11info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/22032Orsatti, Ana Maria; Vega, Ema Irene; Marraco, Hugo Gustavo; Polarimetry in the outskirts of NGC 6611; IOP Publishing; Astronomical Journal; 132; 5; 11-2006; 1783-17880004-6256CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/article/10.1086/507674/metainfo:eu-repo/semantics/altIdentifier/doi/10.1086/507674info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:46:00Zoai:ri.conicet.gov.ar:11336/22032instacron: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 10:46:00.864CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Polarimetry in the outskirts of NGC 6611
title Polarimetry in the outskirts of NGC 6611
spellingShingle Polarimetry in the outskirts of NGC 6611
Orsatti, Ana Maria
Dust
Interstellar Medium
Open Clusters
Polarimetry
title_short Polarimetry in the outskirts of NGC 6611
title_full Polarimetry in the outskirts of NGC 6611
title_fullStr Polarimetry in the outskirts of NGC 6611
title_full_unstemmed Polarimetry in the outskirts of NGC 6611
title_sort Polarimetry in the outskirts of NGC 6611
dc.creator.none.fl_str_mv Orsatti, Ana Maria
Vega, Ema Irene
Marraco, Hugo Gustavo
author Orsatti, Ana Maria
author_facet Orsatti, Ana Maria
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 Dust
Interstellar Medium
Open Clusters
Polarimetry
topic Dust
Interstellar Medium
Open Clusters
Polarimetry
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 new polarimetric UBVRI observations of 25 stars in the direction of the halo of NGC 6611, the rich stellar open cluster embedded in an ionized hydrogen complex (M16). Our plan is to characterize the interstellar material (ISM) associated with halo stars in order to make a comparison with the ISM dusty core characteristics that resulted from a previous investigation by the same authors. Of the halo stars, 47% (8 out of 17) show indications of intrinsic polarization in their light, similar to what was found for core stars (50%). We have identified the presence of nearby dust clouds located on the Local arm that produce a mean polarization of about 1%; a value = 0.61 ± 0.07 μm, which is slightly larger than that of the average ISM; and a mean direction of the polarization vectors of = 81fdg9 ± 1fdg8. The ISM associated with the halo region has similar to the general interstellar medium (0.55 ± 0.07 μm). The observed polarizations show a gradual increase from halo ( = 1.93% ± 0.3%) to core ( = 3.19% ± 0.63%). Position angles of the e-vector for both groups are generally similar, but there exists a slight difference in mean direction between them that is within the errors. We have also found that the halo stars are possibly represented by Whittet & van Breda's relationship, while in the cluster's core the dust does not fulfill the above-mentioned relationship. As a conclusion, we cannot find any clear difference between core and halo dust characteristics, with the exception of , which may suggest a change in dust size.
Fil: Orsatti, Ana Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica la Plata; Argentina
Fil: Vega, Ema Irene. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Marraco, Hugo Gustavo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
description We present new polarimetric UBVRI observations of 25 stars in the direction of the halo of NGC 6611, the rich stellar open cluster embedded in an ionized hydrogen complex (M16). Our plan is to characterize the interstellar material (ISM) associated with halo stars in order to make a comparison with the ISM dusty core characteristics that resulted from a previous investigation by the same authors. Of the halo stars, 47% (8 out of 17) show indications of intrinsic polarization in their light, similar to what was found for core stars (50%). We have identified the presence of nearby dust clouds located on the Local arm that produce a mean polarization of about 1%; a value = 0.61 ± 0.07 μm, which is slightly larger than that of the average ISM; and a mean direction of the polarization vectors of = 81fdg9 ± 1fdg8. The ISM associated with the halo region has similar to the general interstellar medium (0.55 ± 0.07 μm). The observed polarizations show a gradual increase from halo ( = 1.93% ± 0.3%) to core ( = 3.19% ± 0.63%). Position angles of the e-vector for both groups are generally similar, but there exists a slight difference in mean direction between them that is within the errors. We have also found that the halo stars are possibly represented by Whittet & van Breda's relationship, while in the cluster's core the dust does not fulfill the above-mentioned relationship. As a conclusion, we cannot find any clear difference between core and halo dust characteristics, with the exception of , which may suggest a change in dust size.
publishDate 2006
dc.date.none.fl_str_mv 2006-11
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/11336/22032
Orsatti, Ana Maria; Vega, Ema Irene; Marraco, Hugo Gustavo; Polarimetry in the outskirts of NGC 6611; IOP Publishing; Astronomical Journal; 132; 5; 11-2006; 1783-1788
0004-6256
CONICET Digital
CONICET
url http://hdl.handle.net/11336/22032
identifier_str_mv Orsatti, Ana Maria; Vega, Ema Irene; Marraco, Hugo Gustavo; Polarimetry in the outskirts of NGC 6611; IOP Publishing; Astronomical Journal; 132; 5; 11-2006; 1783-1788
0004-6256
CONICET Digital
CONICET
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/10.1086/507674/meta
info:eu-repo/semantics/altIdentifier/doi/10.1086/507674
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
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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