The spectral type of CHS 7797 - an intriguing very low mass periodic variable in the Orion Nebula Cluster

Autores
Rodriguez Ledesma, María V.; Mundt, Reinhard; Pintado, Olga Ines; Boudreault, Steve; Hessman, Frederic; Herbst, William
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Aims: We present the spectroscopic characterization of the unusual high-amplitude very low mass pre-main-sequence periodic variable CHS 7797. Methods: This study is based on optical medium-resolution (R = 2200) spectroscopy in the 6450 − 8600   Å range, carried out with GMOS-GEMINI -S in March 2011. Observations of CHS 7797 have been carried out at two distinct phases of the 17.8 d period, namely at maximum (I ≈ 17.4 mag) and four days before maximum (I ≈ 18.5 mag). Four different spectral indices were used for the spectral classification at these two phases, all of them well-suited for spectral classification of young and obscured late M dwarfs. In addition, the gravity-sensitive Na I (8183/8195 Å) and K I (7665/7699 Å) doublet lines were used to confirm the young age of CHS 7797. Results: From the spectrum obtained at maximum light we derived a spectral type (SpT) of M 6.05  ±  0.25, while for the spectrum taken four days before maximum the derived SpT is M 5.75  ±  0.25. The derived SpTs confirm that CHS 7797 has a mass in the stellar-substellar boundary mass range. In addition, the small differences in the derived SpTs at the two observed phases may provide indirect hints that CHS 7797 is a binary system of similar mass components surrounded by a tilted circumbinary disk, a system similar to KH 15D.
Fil: Rodriguez Ledesma, María V.. Max-Planck-Institut fur Astronomie; Alemania. Georg-August-Universität; Alemania
Fil: Mundt, Reinhard. Max-Planck-Institut fur Astronomie; Alemania
Fil: Pintado, Olga Ines. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto Superior de Correlación Geológica. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo. Departamento de Geología. Cátedra Geología Estructural. Instituto Superior de Correlación Geológica; Argentina
Fil: Boudreault, Steve. Instituto de Astrof´ısica de Canarias; España. Universidad de la Laguna; España
Fil: Hessman, Frederic. Georg-August-Universität; Alemania
Fil: Herbst, William. Wesleyan University; Estados Unidos
Materia
Stars: low-mass
Pre main sequence stars
Brown dwarfs
Stars: variable, binary
Spectroscopy
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:11336/26366
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/26366
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling The spectral type of CHS 7797 - an intriguing very low mass periodic variable in the Orion Nebula ClusterRodriguez Ledesma, María V.Mundt, ReinhardPintado, Olga InesBoudreault, SteveHessman, FredericHerbst, WilliamStars: low-massPre main sequence starsBrown dwarfsStars: variable, binarySpectroscopyhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Aims: We present the spectroscopic characterization of the unusual high-amplitude very low mass pre-main-sequence periodic variable CHS 7797. Methods: This study is based on optical medium-resolution (R = 2200) spectroscopy in the 6450 − 8600   Å range, carried out with GMOS-GEMINI -S in March 2011. Observations of CHS 7797 have been carried out at two distinct phases of the 17.8 d period, namely at maximum (I ≈ 17.4 mag) and four days before maximum (I ≈ 18.5 mag). Four different spectral indices were used for the spectral classification at these two phases, all of them well-suited for spectral classification of young and obscured late M dwarfs. In addition, the gravity-sensitive Na I (8183/8195 Å) and K I (7665/7699 Å) doublet lines were used to confirm the young age of CHS 7797. Results: From the spectrum obtained at maximum light we derived a spectral type (SpT) of M 6.05  ±  0.25, while for the spectrum taken four days before maximum the derived SpT is M 5.75  ±  0.25. The derived SpTs confirm that CHS 7797 has a mass in the stellar-substellar boundary mass range. In addition, the small differences in the derived SpTs at the two observed phases may provide indirect hints that CHS 7797 is a binary system of similar mass components surrounded by a tilted circumbinary disk, a system similar to KH 15D.Fil: Rodriguez Ledesma, María V.. Max-Planck-Institut fur Astronomie; Alemania. Georg-August-Universität; AlemaniaFil: Mundt, Reinhard. Max-Planck-Institut fur Astronomie; AlemaniaFil: Pintado, Olga Ines. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto Superior de Correlación Geológica. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo. Departamento de Geología. Cátedra Geología Estructural. Instituto Superior de Correlación Geológica; ArgentinaFil: Boudreault, Steve. Instituto de Astrof´ısica de Canarias; España. Universidad de la Laguna; EspañaFil: Hessman, Frederic. Georg-August-Universität; AlemaniaFil: Herbst, William. Wesleyan University; Estados UnidosEDP Sciences2013-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/26366Rodriguez Ledesma, María V.; Mundt, Reinhard; Pintado, Olga Ines; Boudreault, Steve; Hessman, Frederic; et al.; The spectral type of CHS 7797 - an intriguing very low mass periodic variable in the Orion Nebula Cluster; EDP Sciences; Astronomy and Astrophysics; 551; 2-2013; 1-6; A440004-6361CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201219748info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/abs/2013/03/aa19748-12/aa19748-12.htmlinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-11-12T09:44:32Zoai:ri.conicet.gov.ar:11336/26366instacron: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:34982025-11-12 09:44:32.786CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv The spectral type of CHS 7797 - an intriguing very low mass periodic variable in the Orion Nebula Cluster
title The spectral type of CHS 7797 - an intriguing very low mass periodic variable in the Orion Nebula Cluster
spellingShingle The spectral type of CHS 7797 - an intriguing very low mass periodic variable in the Orion Nebula Cluster
Rodriguez Ledesma, María V.
Stars: low-mass
Pre main sequence stars
Brown dwarfs
Stars: variable, binary
Spectroscopy
title_short The spectral type of CHS 7797 - an intriguing very low mass periodic variable in the Orion Nebula Cluster
title_full The spectral type of CHS 7797 - an intriguing very low mass periodic variable in the Orion Nebula Cluster
title_fullStr The spectral type of CHS 7797 - an intriguing very low mass periodic variable in the Orion Nebula Cluster
title_full_unstemmed The spectral type of CHS 7797 - an intriguing very low mass periodic variable in the Orion Nebula Cluster
title_sort The spectral type of CHS 7797 - an intriguing very low mass periodic variable in the Orion Nebula Cluster
dc.creator.none.fl_str_mv Rodriguez Ledesma, María V.
Mundt, Reinhard
Pintado, Olga Ines
Boudreault, Steve
Hessman, Frederic
Herbst, William
author Rodriguez Ledesma, María V.
author_facet Rodriguez Ledesma, María V.
Mundt, Reinhard
Pintado, Olga Ines
Boudreault, Steve
Hessman, Frederic
Herbst, William
author_role author
author2 Mundt, Reinhard
Pintado, Olga Ines
Boudreault, Steve
Hessman, Frederic
Herbst, William
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Stars: low-mass
Pre main sequence stars
Brown dwarfs
Stars: variable, binary
Spectroscopy
topic Stars: low-mass
Pre main sequence stars
Brown dwarfs
Stars: variable, binary
Spectroscopy
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Aims: We present the spectroscopic characterization of the unusual high-amplitude very low mass pre-main-sequence periodic variable CHS 7797. Methods: This study is based on optical medium-resolution (R = 2200) spectroscopy in the 6450 − 8600   Å range, carried out with GMOS-GEMINI -S in March 2011. Observations of CHS 7797 have been carried out at two distinct phases of the 17.8 d period, namely at maximum (I ≈ 17.4 mag) and four days before maximum (I ≈ 18.5 mag). Four different spectral indices were used for the spectral classification at these two phases, all of them well-suited for spectral classification of young and obscured late M dwarfs. In addition, the gravity-sensitive Na I (8183/8195 Å) and K I (7665/7699 Å) doublet lines were used to confirm the young age of CHS 7797. Results: From the spectrum obtained at maximum light we derived a spectral type (SpT) of M 6.05  ±  0.25, while for the spectrum taken four days before maximum the derived SpT is M 5.75  ±  0.25. The derived SpTs confirm that CHS 7797 has a mass in the stellar-substellar boundary mass range. In addition, the small differences in the derived SpTs at the two observed phases may provide indirect hints that CHS 7797 is a binary system of similar mass components surrounded by a tilted circumbinary disk, a system similar to KH 15D.
Fil: Rodriguez Ledesma, María V.. Max-Planck-Institut fur Astronomie; Alemania. Georg-August-Universität; Alemania
Fil: Mundt, Reinhard. Max-Planck-Institut fur Astronomie; Alemania
Fil: Pintado, Olga Ines. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto Superior de Correlación Geológica. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo. Departamento de Geología. Cátedra Geología Estructural. Instituto Superior de Correlación Geológica; Argentina
Fil: Boudreault, Steve. Instituto de Astrof´ısica de Canarias; España. Universidad de la Laguna; España
Fil: Hessman, Frederic. Georg-August-Universität; Alemania
Fil: Herbst, William. Wesleyan University; Estados Unidos
description Aims: We present the spectroscopic characterization of the unusual high-amplitude very low mass pre-main-sequence periodic variable CHS 7797. Methods: This study is based on optical medium-resolution (R = 2200) spectroscopy in the 6450 − 8600   Å range, carried out with GMOS-GEMINI -S in March 2011. Observations of CHS 7797 have been carried out at two distinct phases of the 17.8 d period, namely at maximum (I ≈ 17.4 mag) and four days before maximum (I ≈ 18.5 mag). Four different spectral indices were used for the spectral classification at these two phases, all of them well-suited for spectral classification of young and obscured late M dwarfs. In addition, the gravity-sensitive Na I (8183/8195 Å) and K I (7665/7699 Å) doublet lines were used to confirm the young age of CHS 7797. Results: From the spectrum obtained at maximum light we derived a spectral type (SpT) of M 6.05  ±  0.25, while for the spectrum taken four days before maximum the derived SpT is M 5.75  ±  0.25. The derived SpTs confirm that CHS 7797 has a mass in the stellar-substellar boundary mass range. In addition, the small differences in the derived SpTs at the two observed phases may provide indirect hints that CHS 7797 is a binary system of similar mass components surrounded by a tilted circumbinary disk, a system similar to KH 15D.
publishDate 2013
dc.date.none.fl_str_mv 2013-02
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/11336/26366
Rodriguez Ledesma, María V.; Mundt, Reinhard; Pintado, Olga Ines; Boudreault, Steve; Hessman, Frederic; et al.; The spectral type of CHS 7797 - an intriguing very low mass periodic variable in the Orion Nebula Cluster; EDP Sciences; Astronomy and Astrophysics; 551; 2-2013; 1-6; A44
0004-6361
CONICET Digital
CONICET
url http://hdl.handle.net/11336/26366
identifier_str_mv Rodriguez Ledesma, María V.; Mundt, Reinhard; Pintado, Olga Ines; Boudreault, Steve; Hessman, Frederic; et al.; The spectral type of CHS 7797 - an intriguing very low mass periodic variable in the Orion Nebula Cluster; EDP Sciences; Astronomy and Astrophysics; 551; 2-2013; 1-6; A44
0004-6361
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201219748
info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/abs/2013/03/aa19748-12/aa19748-12.html
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
dc.publisher.none.fl_str_mv EDP Sciences
publisher.none.fl_str_mv EDP Sciences
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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