Dust properties in NGC 6611
- Autores
- Orsatti, Ana María; Vega, Ema Irene; Marraco, Hugo Gustavo
- Año de publicación
- 2000
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- An investigation on dust properties in the NW portion of NGC 6611 has been conducted polarimetrically to test the existence of abnormal extinction in that section of the open cluster in an independent way. As previously suggested for the η Carinae nebula by Tapia et al. (1988b) and subsequently confirmed by Marraco et al. (1993), the canonical relation between EV-K/EB-V and λmax (the wavelength of maximun interstellar polarization) is not valid for stars belonging to dusty H II regions, as is the case for the observed portion of M 16. This may arise mainly from the presence of silicate grains of a slightly larger size than the standard ISM and also from a considerable increase in mean graphite grain size, according to previous results from Chini & Wargau (1990). About 50% of the observed stars in NGC 6611 present indications of intrinsic polarization in their measurements; a similar percentage was found in IC 2944 (Vega et al. 1994), another young open cluster in close relation with an H II region.
Facultad de Ciencias Astronómicas y Geofísicas - Materia
-
Ciencias Astronómicas
Galaxy: Open clusters and associations: Individual (NGC 6611)
ISM: Dust, extinction
ISM: HII regions
ISM: Magnetic fields - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by-nc-sa/4.0/
- Repositorio
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/83455
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Dust properties in NGC 6611Orsatti, Ana MaríaVega, Ema IreneMarraco, Hugo GustavoCiencias AstronómicasGalaxy: Open clusters and associations: Individual (NGC 6611)ISM: Dust, extinctionISM: HII regionsISM: Magnetic fieldsAn investigation on dust properties in the NW portion of NGC 6611 has been conducted polarimetrically to test the existence of abnormal extinction in that section of the open cluster in an independent way. As previously suggested for the η Carinae nebula by Tapia et al. (1988b) and subsequently confirmed by Marraco et al. (1993), the canonical relation between EV-K/EB-V and λmax (the wavelength of maximun interstellar polarization) is not valid for stars belonging to dusty H II regions, as is the case for the observed portion of M 16. This may arise mainly from the presence of silicate grains of a slightly larger size than the standard ISM and also from a considerable increase in mean graphite grain size, according to previous results from Chini & Wargau (1990). About 50% of the observed stars in NGC 6611 present indications of intrinsic polarization in their measurements; a similar percentage was found in IC 2944 (Vega et al. 1994), another young open cluster in close relation with an H II region.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/pdf195-202http://sedici.unlp.edu.ar/handle/10915/83455enginfo:eu-repo/semantics/altIdentifier/issn/0365-0138info:eu-repo/semantics/altIdentifier/doi/10.1051/aas:2000206info: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:UNLP2025-09-29T11:15:51Zoai:sedici.unlp.edu.ar:10915/83455Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:15:51.663SEDICI (UNLP) - Universidad Nacional de La Platafalse |
dc.title.none.fl_str_mv |
Dust properties in NGC 6611 |
title |
Dust properties in NGC 6611 |
spellingShingle |
Dust properties in NGC 6611 Orsatti, Ana María Ciencias Astronómicas Galaxy: Open clusters and associations: Individual (NGC 6611) ISM: Dust, extinction ISM: HII regions ISM: Magnetic fields |
title_short |
Dust properties in NGC 6611 |
title_full |
Dust properties in NGC 6611 |
title_fullStr |
Dust properties in NGC 6611 |
title_full_unstemmed |
Dust properties in NGC 6611 |
title_sort |
Dust properties in NGC 6611 |
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 Galaxy: Open clusters and associations: Individual (NGC 6611) ISM: Dust, extinction ISM: HII regions ISM: Magnetic fields |
topic |
Ciencias Astronómicas Galaxy: Open clusters and associations: Individual (NGC 6611) ISM: Dust, extinction ISM: HII regions ISM: Magnetic fields |
dc.description.none.fl_txt_mv |
An investigation on dust properties in the NW portion of NGC 6611 has been conducted polarimetrically to test the existence of abnormal extinction in that section of the open cluster in an independent way. As previously suggested for the η Carinae nebula by Tapia et al. (1988b) and subsequently confirmed by Marraco et al. (1993), the canonical relation between EV-K/EB-V and λmax (the wavelength of maximun interstellar polarization) is not valid for stars belonging to dusty H II regions, as is the case for the observed portion of M 16. This may arise mainly from the presence of silicate grains of a slightly larger size than the standard ISM and also from a considerable increase in mean graphite grain size, according to previous results from Chini & Wargau (1990). About 50% of the observed stars in NGC 6611 present indications of intrinsic polarization in their measurements; a similar percentage was found in IC 2944 (Vega et al. 1994), another young open cluster in close relation with an H II region. Facultad de Ciencias Astronómicas y Geofísicas |
description |
An investigation on dust properties in the NW portion of NGC 6611 has been conducted polarimetrically to test the existence of abnormal extinction in that section of the open cluster in an independent way. As previously suggested for the η Carinae nebula by Tapia et al. (1988b) and subsequently confirmed by Marraco et al. (1993), the canonical relation between EV-K/EB-V and λmax (the wavelength of maximun interstellar polarization) is not valid for stars belonging to dusty H II regions, as is the case for the observed portion of M 16. This may arise mainly from the presence of silicate grains of a slightly larger size than the standard ISM and also from a considerable increase in mean graphite grain size, according to previous results from Chini & Wargau (1990). About 50% of the observed stars in NGC 6611 present indications of intrinsic polarization in their measurements; a similar percentage was found in IC 2944 (Vega et al. 1994), another young open cluster in close relation with an H II region. |
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/10915/83455 |
url |
http://sedici.unlp.edu.ar/handle/10915/83455 |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/issn/0365-0138 info:eu-repo/semantics/altIdentifier/doi/10.1051/aas:2000206 |
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) |
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openAccess |
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http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) |
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application/pdf 195-202 |
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