Discovery of Raman-scattered lines in the massive luminous emission-line: Star LHA 115-S 18

Autores
Torres, Andrea Fabiana; Kraus, M.; Cidale, Lydia Sonia; Barba, Rodolfo Hector; Borges Fernandes, M.; Brandi, E.
Año de publicación
2012
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
LHA 115-S 18 is a very peculiar emission-line star exhibiting the B[e] phenomenon. Located in the Small Magellanic Cloud, its spectrum shows features of an extremely wide range of excitation and ionization stages, extending from highly ionized atomic lines (Si IV, CIV, HeII) in the ultraviolet and optical regions to molecular emission bands of CO and TiO in the optical and infrared regions. The most distinguishing spectral characteristic of LHA 115-S 18 is the high variability detected in the He II λ4686 emission line, which can be a very conspicuous or completely invisible feature. In thiswork,we report on another peculiarity ofLHA115-S 18. From high-resolution optical spectra taken between 2000 and 2008, we discovered the appearance and strengthening of two emission features at λλ6825 and 7082Å, which we have identified as Raman-scattered lines. This is the first time that these lines have been detected in the spectrum of a massive luminous B[e] star. As the classification of LHA 115-S 18 is highly controversial, we discuss how the discovery of the appearance of Raman-scattered lines in this peculiar star might help us to solve this puzzle.
Fil: Torres, Andrea Fabiana. 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: Kraus, M.. Akademie věd České Republiky; República Checa
Fil: Cidale, Lydia Sonia. 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: Barba, Rodolfo Hector. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio. Universidad Nacional de San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio; Argentina
Fil: Borges Fernandes, M.. Ministério de Ciencia, Tecnologia e Innovacao. Observatorio Nacional; Brasil
Fil: Brandi, E.. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas; Argentina
Materia
CIRCUMSTELLAR MATTER
STARS: INDIVIDUAL: LHA 115-S 18
STARS: MASSIVE
STARS: PECULIAR
SUPERGIANTS
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:11336/82539
Acceder
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network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Discovery of Raman-scattered lines in the massive luminous emission-line: Star LHA 115-S 18Torres, Andrea FabianaKraus, M.Cidale, Lydia SoniaBarba, Rodolfo HectorBorges Fernandes, M.Brandi, E.CIRCUMSTELLAR MATTERSTARS: INDIVIDUAL: LHA 115-S 18STARS: MASSIVESTARS: PECULIARSUPERGIANTShttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1LHA 115-S 18 is a very peculiar emission-line star exhibiting the B[e] phenomenon. Located in the Small Magellanic Cloud, its spectrum shows features of an extremely wide range of excitation and ionization stages, extending from highly ionized atomic lines (Si IV, CIV, HeII) in the ultraviolet and optical regions to molecular emission bands of CO and TiO in the optical and infrared regions. The most distinguishing spectral characteristic of LHA 115-S 18 is the high variability detected in the He II λ4686 emission line, which can be a very conspicuous or completely invisible feature. In thiswork,we report on another peculiarity ofLHA115-S 18. From high-resolution optical spectra taken between 2000 and 2008, we discovered the appearance and strengthening of two emission features at λλ6825 and 7082Å, which we have identified as Raman-scattered lines. This is the first time that these lines have been detected in the spectrum of a massive luminous B[e] star. As the classification of LHA 115-S 18 is highly controversial, we discuss how the discovery of the appearance of Raman-scattered lines in this peculiar star might help us to solve this puzzle.Fil: Torres, Andrea Fabiana. 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: Kraus, M.. Akademie věd České Republiky; República ChecaFil: Cidale, Lydia Sonia. 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: Barba, Rodolfo Hector. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio. Universidad Nacional de San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio; ArgentinaFil: Borges Fernandes, M.. Ministério de Ciencia, Tecnologia e Innovacao. Observatorio Nacional; BrasilFil: Brandi, E.. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas; ArgentinaWiley Blackwell Publishing, Inc2012-11info: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/11336/82539Torres, Andrea Fabiana; Kraus, M.; Cidale, Lydia Sonia; Barba, Rodolfo Hector; Borges Fernandes, M.; et al.; Discovery of Raman-scattered lines in the massive luminous emission-line: Star LHA 115-S 18; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society: Letters; 427; 1; 11-2012; 80-840035-8711CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1111/j.1745-3933.2012.01349.xinfo:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnrasl/article/427/1/L80/1003671info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:35:27Zoai:ri.conicet.gov.ar:11336/82539instacron: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:34982025-10-22 11:35:28.151CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Discovery of Raman-scattered lines in the massive luminous emission-line: Star LHA 115-S 18
title Discovery of Raman-scattered lines in the massive luminous emission-line: Star LHA 115-S 18
spellingShingle Discovery of Raman-scattered lines in the massive luminous emission-line: Star LHA 115-S 18
Torres, Andrea Fabiana
CIRCUMSTELLAR MATTER
STARS: INDIVIDUAL: LHA 115-S 18
STARS: MASSIVE
STARS: PECULIAR
SUPERGIANTS
title_short Discovery of Raman-scattered lines in the massive luminous emission-line: Star LHA 115-S 18
title_full Discovery of Raman-scattered lines in the massive luminous emission-line: Star LHA 115-S 18
title_fullStr Discovery of Raman-scattered lines in the massive luminous emission-line: Star LHA 115-S 18
title_full_unstemmed Discovery of Raman-scattered lines in the massive luminous emission-line: Star LHA 115-S 18
title_sort Discovery of Raman-scattered lines in the massive luminous emission-line: Star LHA 115-S 18
dc.creator.none.fl_str_mv Torres, Andrea Fabiana
Kraus, M.
Cidale, Lydia Sonia
Barba, Rodolfo Hector
Borges Fernandes, M.
Brandi, E.
author Torres, Andrea Fabiana
author_facet Torres, Andrea Fabiana
Kraus, M.
Cidale, Lydia Sonia
Barba, Rodolfo Hector
Borges Fernandes, M.
Brandi, E.
author_role author
author2 Kraus, M.
Cidale, Lydia Sonia
Barba, Rodolfo Hector
Borges Fernandes, M.
Brandi, E.
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv CIRCUMSTELLAR MATTER
STARS: INDIVIDUAL: LHA 115-S 18
STARS: MASSIVE
STARS: PECULIAR
SUPERGIANTS
topic CIRCUMSTELLAR MATTER
STARS: INDIVIDUAL: LHA 115-S 18
STARS: MASSIVE
STARS: PECULIAR
SUPERGIANTS
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv LHA 115-S 18 is a very peculiar emission-line star exhibiting the B[e] phenomenon. Located in the Small Magellanic Cloud, its spectrum shows features of an extremely wide range of excitation and ionization stages, extending from highly ionized atomic lines (Si IV, CIV, HeII) in the ultraviolet and optical regions to molecular emission bands of CO and TiO in the optical and infrared regions. The most distinguishing spectral characteristic of LHA 115-S 18 is the high variability detected in the He II λ4686 emission line, which can be a very conspicuous or completely invisible feature. In thiswork,we report on another peculiarity ofLHA115-S 18. From high-resolution optical spectra taken between 2000 and 2008, we discovered the appearance and strengthening of two emission features at λλ6825 and 7082Å, which we have identified as Raman-scattered lines. This is the first time that these lines have been detected in the spectrum of a massive luminous B[e] star. As the classification of LHA 115-S 18 is highly controversial, we discuss how the discovery of the appearance of Raman-scattered lines in this peculiar star might help us to solve this puzzle.
Fil: Torres, Andrea Fabiana. 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: Kraus, M.. Akademie věd České Republiky; República Checa
Fil: Cidale, Lydia Sonia. 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: Barba, Rodolfo Hector. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio. Universidad Nacional de San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio; Argentina
Fil: Borges Fernandes, M.. Ministério de Ciencia, Tecnologia e Innovacao. Observatorio Nacional; Brasil
Fil: Brandi, E.. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas; Argentina
description LHA 115-S 18 is a very peculiar emission-line star exhibiting the B[e] phenomenon. Located in the Small Magellanic Cloud, its spectrum shows features of an extremely wide range of excitation and ionization stages, extending from highly ionized atomic lines (Si IV, CIV, HeII) in the ultraviolet and optical regions to molecular emission bands of CO and TiO in the optical and infrared regions. The most distinguishing spectral characteristic of LHA 115-S 18 is the high variability detected in the He II λ4686 emission line, which can be a very conspicuous or completely invisible feature. In thiswork,we report on another peculiarity ofLHA115-S 18. From high-resolution optical spectra taken between 2000 and 2008, we discovered the appearance and strengthening of two emission features at λλ6825 and 7082Å, which we have identified as Raman-scattered lines. This is the first time that these lines have been detected in the spectrum of a massive luminous B[e] star. As the classification of LHA 115-S 18 is highly controversial, we discuss how the discovery of the appearance of Raman-scattered lines in this peculiar star might help us to solve this puzzle.
publishDate 2012
dc.date.none.fl_str_mv 2012-11
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/11336/82539
Torres, Andrea Fabiana; Kraus, M.; Cidale, Lydia Sonia; Barba, Rodolfo Hector; Borges Fernandes, M.; et al.; Discovery of Raman-scattered lines in the massive luminous emission-line: Star LHA 115-S 18; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society: Letters; 427; 1; 11-2012; 80-84
0035-8711
CONICET Digital
CONICET
url http://hdl.handle.net/11336/82539
identifier_str_mv Torres, Andrea Fabiana; Kraus, M.; Cidale, Lydia Sonia; Barba, Rodolfo Hector; Borges Fernandes, M.; et al.; Discovery of Raman-scattered lines in the massive luminous emission-line: Star LHA 115-S 18; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society: Letters; 427; 1; 11-2012; 80-84
0035-8711
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1745-3933.2012.01349.x
info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnrasl/article/427/1/L80/1003671
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 Wiley Blackwell Publishing, Inc
publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
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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score 12.982451

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