Early results from the galactic O-star spectroscopic survey: C III emission lines in of spectra

Autores
Walborn, Nolan Revere; Sota, Alfredo; Maíz Apellániz, Jesús; Alfaro, Emilio J.; Morrell, Nidia Irene; Barbá, Rodolfo Héctor; Arias, Julia Inés; Gamen, Roberto Claudio
Año de publicación
2010
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
On the basis of an extensive new spectroscopic survey of Galactic O stars, we introduce the Ofc category, which consists of normal spectra with C III λλ4647-4650-4652 emission lines of comparable intensity to those of the Of defining lines N III λλ4634-4640-4642. The former feature is strongly peaked to spectral type O5, at all luminosity classes, but preferentially in some associations or clusters and not others. The relationships of this phenomenon to the selective C III λ5696 emission throughout the normal Of domain, and to the peculiar, variable Of?p category, for which strong C III λλ4647-4650-4652 emission is a defining characteristic, are discussed. Magnetic fields have recently been detected on two members of the latter category. We also present two new extreme Of?p stars, NGC 1624-2 and CPD -28° 2561, bringing the number known in the Galaxy to five. Modeling of the behavior of these spectral features can be expected to better define the physical parameters of both normal and peculiar objects, as well as the atomic physics involved.
Instituto de Astrofísica de La Plata
Facultad de Ciencias Astronómicas y Geofísicas
Materia
Ciencias Astronómicas
Stars: early-type
Stars: emission-line, Be
Stars: fundamental parameters
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/82503

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oai_identifier_str oai:sedici.unlp.edu.ar:10915/82503
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Early results from the galactic O-star spectroscopic survey: C III emission lines in of spectraWalborn, Nolan RevereSota, AlfredoMaíz Apellániz, JesúsAlfaro, Emilio J.Morrell, Nidia IreneBarbá, Rodolfo HéctorArias, Julia InésGamen, Roberto ClaudioCiencias AstronómicasStars: early-typeStars: emission-line, BeStars: fundamental parametersOn the basis of an extensive new spectroscopic survey of Galactic O stars, we introduce the Ofc category, which consists of normal spectra with C III λλ4647-4650-4652 emission lines of comparable intensity to those of the Of defining lines N III λλ4634-4640-4642. The former feature is strongly peaked to spectral type O5, at all luminosity classes, but preferentially in some associations or clusters and not others. The relationships of this phenomenon to the selective C III λ5696 emission throughout the normal Of domain, and to the peculiar, variable Of?p category, for which strong C III λλ4647-4650-4652 emission is a defining characteristic, are discussed. Magnetic fields have recently been detected on two members of the latter category. We also present two new extreme Of?p stars, NGC 1624-2 and CPD -28° 2561, bringing the number known in the Galaxy to five. Modeling of the behavior of these spectral features can be expected to better define the physical parameters of both normal and peculiar objects, as well as the atomic physics involved.Instituto de Astrofísica de La PlataFacultad de Ciencias Astronómicas y Geofísicas2010info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfL143-L147http://sedici.unlp.edu.ar/handle/10915/82503enginfo:eu-repo/semantics/altIdentifier/issn/2041-8205info:eu-repo/semantics/altIdentifier/doi/10.1088/2041-8205/711/2/L143info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:15:31Zoai:sedici.unlp.edu.ar:10915/82503Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:15:32.189SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Early results from the galactic O-star spectroscopic survey: C III emission lines in of spectra
title Early results from the galactic O-star spectroscopic survey: C III emission lines in of spectra
spellingShingle Early results from the galactic O-star spectroscopic survey: C III emission lines in of spectra
Walborn, Nolan Revere
Ciencias Astronómicas
Stars: early-type
Stars: emission-line, Be
Stars: fundamental parameters
title_short Early results from the galactic O-star spectroscopic survey: C III emission lines in of spectra
title_full Early results from the galactic O-star spectroscopic survey: C III emission lines in of spectra
title_fullStr Early results from the galactic O-star spectroscopic survey: C III emission lines in of spectra
title_full_unstemmed Early results from the galactic O-star spectroscopic survey: C III emission lines in of spectra
title_sort Early results from the galactic O-star spectroscopic survey: C III emission lines in of spectra
dc.creator.none.fl_str_mv Walborn, Nolan Revere
Sota, Alfredo
Maíz Apellániz, Jesús
Alfaro, Emilio J.
Morrell, Nidia Irene
Barbá, Rodolfo Héctor
Arias, Julia Inés
Gamen, Roberto Claudio
author Walborn, Nolan Revere
author_facet Walborn, Nolan Revere
Sota, Alfredo
Maíz Apellániz, Jesús
Alfaro, Emilio J.
Morrell, Nidia Irene
Barbá, Rodolfo Héctor
Arias, Julia Inés
Gamen, Roberto Claudio
author_role author
author2 Sota, Alfredo
Maíz Apellániz, Jesús
Alfaro, Emilio J.
Morrell, Nidia Irene
Barbá, Rodolfo Héctor
Arias, Julia Inés
Gamen, Roberto Claudio
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Ciencias Astronómicas
Stars: early-type
Stars: emission-line, Be
Stars: fundamental parameters
topic Ciencias Astronómicas
Stars: early-type
Stars: emission-line, Be
Stars: fundamental parameters
dc.description.none.fl_txt_mv On the basis of an extensive new spectroscopic survey of Galactic O stars, we introduce the Ofc category, which consists of normal spectra with C III λλ4647-4650-4652 emission lines of comparable intensity to those of the Of defining lines N III λλ4634-4640-4642. The former feature is strongly peaked to spectral type O5, at all luminosity classes, but preferentially in some associations or clusters and not others. The relationships of this phenomenon to the selective C III λ5696 emission throughout the normal Of domain, and to the peculiar, variable Of?p category, for which strong C III λλ4647-4650-4652 emission is a defining characteristic, are discussed. Magnetic fields have recently been detected on two members of the latter category. We also present two new extreme Of?p stars, NGC 1624-2 and CPD -28° 2561, bringing the number known in the Galaxy to five. Modeling of the behavior of these spectral features can be expected to better define the physical parameters of both normal and peculiar objects, as well as the atomic physics involved.
Instituto de Astrofísica de La Plata
Facultad de Ciencias Astronómicas y Geofísicas
description On the basis of an extensive new spectroscopic survey of Galactic O stars, we introduce the Ofc category, which consists of normal spectra with C III λλ4647-4650-4652 emission lines of comparable intensity to those of the Of defining lines N III λλ4634-4640-4642. The former feature is strongly peaked to spectral type O5, at all luminosity classes, but preferentially in some associations or clusters and not others. The relationships of this phenomenon to the selective C III λ5696 emission throughout the normal Of domain, and to the peculiar, variable Of?p category, for which strong C III λλ4647-4650-4652 emission is a defining characteristic, are discussed. Magnetic fields have recently been detected on two members of the latter category. We also present two new extreme Of?p stars, NGC 1624-2 and CPD -28° 2561, bringing the number known in the Galaxy to five. Modeling of the behavior of these spectral features can be expected to better define the physical parameters of both normal and peculiar objects, as well as the atomic physics involved.
publishDate 2010
dc.date.none.fl_str_mv 2010
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
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://sedici.unlp.edu.ar/handle/10915/82503
url http://sedici.unlp.edu.ar/handle/10915/82503
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/2041-8205
info:eu-repo/semantics/altIdentifier/doi/10.1088/2041-8205/711/2/L143
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
L143-L147
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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