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
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/236271
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/236271
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str 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 Técnicas2025-10-22T11:05:54Zoai: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:34982025-10-22 11:05:54.971CONICET 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
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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