A near infrared spectral sequence of O-type dwarfs

Autores
Giudici Michilini, Federico Nicolás; Ferrero, G. A.; Gamen, Roberto Claudio; Morrell, Nidia Irene; Barba, Rodolfo Héctor
Año de publicación
2023
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
The study of spectral morphology is a powerful tool for understanding the fundamental properties of stars. The spectral classification scheme for O stars has been revised in the context of the Galactic O-Star Spectroscopic Survey and a new set of spectral standard stars was proposed. Since the vast majority of the Galactic O stars are visible only in the infrared as they are subject to large interstellar absorption in the optical, it is necessary to extend this work towards those wavelengths. We are working on the construction of a spectral atlas with high quality observations between 0.85 μm and 2.5 μm. The first observations for this project date back to 2013 and were made with the GNIRS (Gemini Observatory, Hawaii) and FIRE (Las Campanas Observatory, Chile) spectrographs. We present here a new batch of results, which includes spectra of a sequence of dwarf standard stars with spectral types ranging from O4 to B0 in the X, Y, J, H, and K near-infrared bands. We analyze this data set to establish some spectral characteristics of such stars, with the aim of defining classification criteria in the near-infrared range such as the ratios between He I λ1.700 μm and HeII λ1.042 μm and between He I λ1.700 μm and HeII λ1.692 μm.
Fil: Giudici Michilini, Federico Nicolás. 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: Ferrero, G. A.. 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: Gamen, Roberto Claudio. 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: Morrell, Nidia Irene. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Observatorio Las Campanas ; Carnegie Institution For Science;
Fil: Barba, Rodolfo Héctor. Universidad de La Serena; Chile. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
64a Reunión Anual de la Asociación Argentina de Astronomía
Buenos Aires
Argentina
Instituto de Astronomía y Física del Espacio
Materia
atlases
stars: early-type
stars: massive
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:11336/234626
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/234626
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling A near infrared spectral sequence of O-type dwarfsGiudici Michilini, Federico NicolásFerrero, G. A.Gamen, Roberto ClaudioMorrell, Nidia IreneBarba, Rodolfo Héctoratlasesstars: early-typestars: massivehttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1The study of spectral morphology is a powerful tool for understanding the fundamental properties of stars. The spectral classification scheme for O stars has been revised in the context of the Galactic O-Star Spectroscopic Survey and a new set of spectral standard stars was proposed. Since the vast majority of the Galactic O stars are visible only in the infrared as they are subject to large interstellar absorption in the optical, it is necessary to extend this work towards those wavelengths. We are working on the construction of a spectral atlas with high quality observations between 0.85 μm and 2.5 μm. The first observations for this project date back to 2013 and were made with the GNIRS (Gemini Observatory, Hawaii) and FIRE (Las Campanas Observatory, Chile) spectrographs. We present here a new batch of results, which includes spectra of a sequence of dwarf standard stars with spectral types ranging from O4 to B0 in the X, Y, J, H, and K near-infrared bands. We analyze this data set to establish some spectral characteristics of such stars, with the aim of defining classification criteria in the near-infrared range such as the ratios between He I λ1.700 μm and HeII λ1.042 μm and between He I λ1.700 μm and HeII λ1.692 μm.Fil: Giudici Michilini, Federico Nicolás. 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: Ferrero, G. A.. 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: Gamen, Roberto Claudio. 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: Morrell, Nidia Irene. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Observatorio Las Campanas ; Carnegie Institution For Science;Fil: Barba, Rodolfo Héctor. Universidad de La Serena; Chile. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina64a Reunión Anual de la Asociación Argentina de AstronomíaBuenos AiresArgentinaInstituto de Astronomía y Física del EspacioAsociación Argentina de AstronomíaRohrmann, Rene DanielMandrini, Cristina HemilseBoeris, Claudia EvelinaSgró, Mario Agustín2023info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectReuniónJournalhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/234626A near infrared spectral sequence of O-type dwarfs; 64a Reunión Anual de la Asociación Argentina de Astronomía; Buenos Aires; Argentina; 2022; 53-550571-32851669-9521CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://ui.adsabs.harvard.edu/abs/2023BAAA...64...53G/abstractinfo:eu-repo/semantics/altIdentifier/url/http://www.astronomiaargentina.org.ar/b64/2023BAAA...64...53G.pdfNacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:08:43Zoai:ri.conicet.gov.ar:11336/234626instacron: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 10:08:43.293CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv A near infrared spectral sequence of O-type dwarfs
title A near infrared spectral sequence of O-type dwarfs
spellingShingle A near infrared spectral sequence of O-type dwarfs
Giudici Michilini, Federico Nicolás
atlases
stars: early-type
stars: massive
title_short A near infrared spectral sequence of O-type dwarfs
title_full A near infrared spectral sequence of O-type dwarfs
title_fullStr A near infrared spectral sequence of O-type dwarfs
title_full_unstemmed A near infrared spectral sequence of O-type dwarfs
title_sort A near infrared spectral sequence of O-type dwarfs
dc.creator.none.fl_str_mv Giudici Michilini, Federico Nicolás
Ferrero, G. A.
Gamen, Roberto Claudio
Morrell, Nidia Irene
Barba, Rodolfo Héctor
author Giudici Michilini, Federico Nicolás
author_facet Giudici Michilini, Federico Nicolás
Ferrero, G. A.
Gamen, Roberto Claudio
Morrell, Nidia Irene
Barba, Rodolfo Héctor
author_role author
author2 Ferrero, G. A.
Gamen, Roberto Claudio
Morrell, Nidia Irene
Barba, Rodolfo Héctor
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Rohrmann, Rene Daniel
Mandrini, Cristina Hemilse
Boeris, Claudia Evelina
Sgró, Mario Agustín
dc.subject.none.fl_str_mv atlases
stars: early-type
stars: massive
topic atlases
stars: early-type
stars: massive
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 study of spectral morphology is a powerful tool for understanding the fundamental properties of stars. The spectral classification scheme for O stars has been revised in the context of the Galactic O-Star Spectroscopic Survey and a new set of spectral standard stars was proposed. Since the vast majority of the Galactic O stars are visible only in the infrared as they are subject to large interstellar absorption in the optical, it is necessary to extend this work towards those wavelengths. We are working on the construction of a spectral atlas with high quality observations between 0.85 μm and 2.5 μm. The first observations for this project date back to 2013 and were made with the GNIRS (Gemini Observatory, Hawaii) and FIRE (Las Campanas Observatory, Chile) spectrographs. We present here a new batch of results, which includes spectra of a sequence of dwarf standard stars with spectral types ranging from O4 to B0 in the X, Y, J, H, and K near-infrared bands. We analyze this data set to establish some spectral characteristics of such stars, with the aim of defining classification criteria in the near-infrared range such as the ratios between He I λ1.700 μm and HeII λ1.042 μm and between He I λ1.700 μm and HeII λ1.692 μm.
Fil: Giudici Michilini, Federico Nicolás. 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: Ferrero, G. A.. 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: Gamen, Roberto Claudio. 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: Morrell, Nidia Irene. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Observatorio Las Campanas ; Carnegie Institution For Science;
Fil: Barba, Rodolfo Héctor. Universidad de La Serena; Chile. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
64a Reunión Anual de la Asociación Argentina de Astronomía
Buenos Aires
Argentina
Instituto de Astronomía y Física del Espacio
description The study of spectral morphology is a powerful tool for understanding the fundamental properties of stars. The spectral classification scheme for O stars has been revised in the context of the Galactic O-Star Spectroscopic Survey and a new set of spectral standard stars was proposed. Since the vast majority of the Galactic O stars are visible only in the infrared as they are subject to large interstellar absorption in the optical, it is necessary to extend this work towards those wavelengths. We are working on the construction of a spectral atlas with high quality observations between 0.85 μm and 2.5 μm. The first observations for this project date back to 2013 and were made with the GNIRS (Gemini Observatory, Hawaii) and FIRE (Las Campanas Observatory, Chile) spectrographs. We present here a new batch of results, which includes spectra of a sequence of dwarf standard stars with spectral types ranging from O4 to B0 in the X, Y, J, H, and K near-infrared bands. We analyze this data set to establish some spectral characteristics of such stars, with the aim of defining classification criteria in the near-infrared range such as the ratios between He I λ1.700 μm and HeII λ1.042 μm and between He I λ1.700 μm and HeII λ1.692 μm.
publishDate 2023
dc.date.none.fl_str_mv 2023
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/conferenceObject
Reunión
Journal
http://purl.org/coar/resource_type/c_5794
info:ar-repo/semantics/documentoDeConferencia
status_str publishedVersion
format conferenceObject
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/234626
A near infrared spectral sequence of O-type dwarfs; 64a Reunión Anual de la Asociación Argentina de Astronomía; Buenos Aires; Argentina; 2022; 53-55
0571-3285
1669-9521
CONICET Digital
CONICET
url http://hdl.handle.net/11336/234626
identifier_str_mv A near infrared spectral sequence of O-type dwarfs; 64a Reunión Anual de la Asociación Argentina de Astronomía; Buenos Aires; Argentina; 2022; 53-55
0571-3285
1669-9521
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://ui.adsabs.harvard.edu/abs/2023BAAA...64...53G/abstract
info:eu-repo/semantics/altIdentifier/url/http://www.astronomiaargentina.org.ar/b64/2023BAAA...64...53G.pdf
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.coverage.none.fl_str_mv Nacional
dc.publisher.none.fl_str_mv Asociación Argentina de Astronomía
publisher.none.fl_str_mv Asociación Argentina de Astronomía
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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