New insight into the FS CMa system MWC 645 from near-infrared and optical spectroscopy
- Autores
- Torres, Andrea Fabiana; Arias, María Laura; Kraus, Michaela; Mercanti, Lorena Verónica; Eenmäe, Tõnis
- Año de publicación
- 2023
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- The B[e] phenomenon is manifested by a heterogeneous group of stars surrounded by gaseous and dusty circumstellar envelopes with similar physical conditions. Among these stars, the FS CMa-type objects are suspected to be binary systems, which could be experiencing or have undergone a mass-transfer process that could explain the large amount of material surrounding them. We aim to contribute to the knowledge of a recently confirmed binary, MWC 645, which could be undergoing an active mass-transfer process. We present near-infrared and optical spectra, identify atomic and molecular spectral features, and derive different quantitative properties of line profiles. Based on publicly available photometric data, we search for periodicity in the light curve and model the spectral energy distribution. We have detected molecular bands of CO in absorption at 1.62 (Formula presented.) m and 2.3 (Formula presented.) m for the first time. We derive an upper limit for the effective temperature of the cool binary component. We found a correlation between the enhancement of the H (Formula presented.) emission and the decrease in optical brightness that could be associated with mass-ejection events or an increase in mass loss. We outline the global properties of the envelope, possibly responsible for brightness variations due to a variable extinction, and briefly speculate on different possible scenarios.
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: Arias, María Laura. Universidad Nacional de La Plata; Argentina. 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, Michaela. Czech Academy of Sciences; República Checa
Fil: Mercanti, Lorena Verónica. 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: Eenmäe, Tõnis. University of Tartu; Estonia - Materia
-
BINARIES: GENERAL
CIRCUMSTELLAR MATTER
STARS: EMISSION-LINE, BE
STARS: INDIVIDUAL: MWC 645
STARS: PECULIAR
TECHNIQUES: SPECTROSCOPIC - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/236271
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oai:ri.conicet.gov.ar:11336/236271 |
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CONICET Digital (CONICET) |
spelling |
New insight into the FS CMa system MWC 645 from near-infrared and optical spectroscopyTorres, Andrea FabianaArias, María LauraKraus, MichaelaMercanti, Lorena VerónicaEenmäe, TõnisBINARIES: GENERALCIRCUMSTELLAR MATTERSTARS: EMISSION-LINE, BESTARS: INDIVIDUAL: MWC 645STARS: PECULIARTECHNIQUES: SPECTROSCOPIChttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1The B[e] phenomenon is manifested by a heterogeneous group of stars surrounded by gaseous and dusty circumstellar envelopes with similar physical conditions. Among these stars, the FS CMa-type objects are suspected to be binary systems, which could be experiencing or have undergone a mass-transfer process that could explain the large amount of material surrounding them. We aim to contribute to the knowledge of a recently confirmed binary, MWC 645, which could be undergoing an active mass-transfer process. We present near-infrared and optical spectra, identify atomic and molecular spectral features, and derive different quantitative properties of line profiles. Based on publicly available photometric data, we search for periodicity in the light curve and model the spectral energy distribution. We have detected molecular bands of CO in absorption at 1.62 (Formula presented.) m and 2.3 (Formula presented.) m for the first time. We derive an upper limit for the effective temperature of the cool binary component. We found a correlation between the enhancement of the H (Formula presented.) emission and the decrease in optical brightness that could be associated with mass-ejection events or an increase in mass loss. We outline the global properties of the envelope, possibly responsible for brightness variations due to a variable extinction, and briefly speculate on different possible scenarios.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: Arias, María Laura. Universidad Nacional de La Plata; Argentina. 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, Michaela. Czech Academy of Sciences; República ChecaFil: Mercanti, Lorena Verónica. 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: Eenmäe, Tõnis. University of Tartu; EstoniaMDPI2023-06info: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/11336/236271Torres, Andrea Fabiana; Arias, María Laura; Kraus, Michaela; Mercanti, Lorena Verónica; Eenmäe, Tõnis; New insight into the FS CMa system MWC 645 from near-infrared and optical spectroscopy; MDPI; Galaxies; 11; 72; 6-2023; 1-202075-4434CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.mdpi.com/2075-4434/11/3/72info:eu-repo/semantics/altIdentifier/doi/10.3390/galaxies11030072info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:37:45Zoai:ri.conicet.gov.ar:11336/236271instacron: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 09:37:45.579CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
New insight into the FS CMa system MWC 645 from near-infrared and optical spectroscopy |
title |
New insight into the FS CMa system MWC 645 from near-infrared and optical spectroscopy |
spellingShingle |
New insight into the FS CMa system MWC 645 from near-infrared and optical spectroscopy Torres, Andrea Fabiana BINARIES: GENERAL CIRCUMSTELLAR MATTER STARS: EMISSION-LINE, BE STARS: INDIVIDUAL: MWC 645 STARS: PECULIAR TECHNIQUES: SPECTROSCOPIC |
title_short |
New insight into the FS CMa system MWC 645 from near-infrared and optical spectroscopy |
title_full |
New insight into the FS CMa system MWC 645 from near-infrared and optical spectroscopy |
title_fullStr |
New insight into the FS CMa system MWC 645 from near-infrared and optical spectroscopy |
title_full_unstemmed |
New insight into the FS CMa system MWC 645 from near-infrared and optical spectroscopy |
title_sort |
New insight into the FS CMa system MWC 645 from near-infrared and optical spectroscopy |
dc.creator.none.fl_str_mv |
Torres, Andrea Fabiana Arias, María Laura Kraus, Michaela Mercanti, Lorena Verónica Eenmäe, Tõnis |
author |
Torres, Andrea Fabiana |
author_facet |
Torres, Andrea Fabiana Arias, María Laura Kraus, Michaela Mercanti, Lorena Verónica Eenmäe, Tõnis |
author_role |
author |
author2 |
Arias, María Laura Kraus, Michaela Mercanti, Lorena Verónica Eenmäe, Tõnis |
author2_role |
author author author author |
dc.subject.none.fl_str_mv |
BINARIES: GENERAL CIRCUMSTELLAR MATTER STARS: EMISSION-LINE, BE STARS: INDIVIDUAL: MWC 645 STARS: PECULIAR TECHNIQUES: SPECTROSCOPIC |
topic |
BINARIES: GENERAL CIRCUMSTELLAR MATTER STARS: EMISSION-LINE, BE STARS: INDIVIDUAL: MWC 645 STARS: PECULIAR TECHNIQUES: SPECTROSCOPIC |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
The B[e] phenomenon is manifested by a heterogeneous group of stars surrounded by gaseous and dusty circumstellar envelopes with similar physical conditions. Among these stars, the FS CMa-type objects are suspected to be binary systems, which could be experiencing or have undergone a mass-transfer process that could explain the large amount of material surrounding them. We aim to contribute to the knowledge of a recently confirmed binary, MWC 645, which could be undergoing an active mass-transfer process. We present near-infrared and optical spectra, identify atomic and molecular spectral features, and derive different quantitative properties of line profiles. Based on publicly available photometric data, we search for periodicity in the light curve and model the spectral energy distribution. We have detected molecular bands of CO in absorption at 1.62 (Formula presented.) m and 2.3 (Formula presented.) m for the first time. We derive an upper limit for the effective temperature of the cool binary component. We found a correlation between the enhancement of the H (Formula presented.) emission and the decrease in optical brightness that could be associated with mass-ejection events or an increase in mass loss. We outline the global properties of the envelope, possibly responsible for brightness variations due to a variable extinction, and briefly speculate on different possible scenarios. 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: Arias, María Laura. Universidad Nacional de La Plata; Argentina. 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, Michaela. Czech Academy of Sciences; República Checa Fil: Mercanti, Lorena Verónica. 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: Eenmäe, Tõnis. University of Tartu; Estonia |
description |
The B[e] phenomenon is manifested by a heterogeneous group of stars surrounded by gaseous and dusty circumstellar envelopes with similar physical conditions. Among these stars, the FS CMa-type objects are suspected to be binary systems, which could be experiencing or have undergone a mass-transfer process that could explain the large amount of material surrounding them. We aim to contribute to the knowledge of a recently confirmed binary, MWC 645, which could be undergoing an active mass-transfer process. We present near-infrared and optical spectra, identify atomic and molecular spectral features, and derive different quantitative properties of line profiles. Based on publicly available photometric data, we search for periodicity in the light curve and model the spectral energy distribution. We have detected molecular bands of CO in absorption at 1.62 (Formula presented.) m and 2.3 (Formula presented.) m for the first time. We derive an upper limit for the effective temperature of the cool binary component. We found a correlation between the enhancement of the H (Formula presented.) emission and the decrease in optical brightness that could be associated with mass-ejection events or an increase in mass loss. We outline the global properties of the envelope, possibly responsible for brightness variations due to a variable extinction, and briefly speculate on different possible scenarios. |
publishDate |
2023 |
dc.date.none.fl_str_mv |
2023-06 |
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/11336/236271 Torres, Andrea Fabiana; Arias, María Laura; Kraus, Michaela; Mercanti, Lorena Verónica; Eenmäe, Tõnis; New insight into the FS CMa system MWC 645 from near-infrared and optical spectroscopy; MDPI; Galaxies; 11; 72; 6-2023; 1-20 2075-4434 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/236271 |
identifier_str_mv |
Torres, Andrea Fabiana; Arias, María Laura; Kraus, Michaela; Mercanti, Lorena Verónica; Eenmäe, Tõnis; New insight into the FS CMa system MWC 645 from near-infrared and optical spectroscopy; MDPI; Galaxies; 11; 72; 6-2023; 1-20 2075-4434 CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/url/https://www.mdpi.com/2075-4434/11/3/72 info:eu-repo/semantics/altIdentifier/doi/10.3390/galaxies11030072 |
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 |
MDPI |
publisher.none.fl_str_mv |
MDPI |
dc.source.none.fl_str_mv |
reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
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CONICET Digital (CONICET) |
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CONICET Digital (CONICET) |
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Consejo Nacional de Investigaciones Científicas y Técnicas |
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CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
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dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
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