Further Results from the Galactic O-Star Spectroscopic Survey: Rapidly Rotating Late ON Giants

Autores
Walborn, Nolan Revere; Maíz Apellániz, Jesús; Sota, Alfredo; Alfaro, Emilio J.; Morrell, Nidia Irene; Barbá, Rodolfo Héctor; Arias, Julia Inés; Gamen, Roberto Claudio
Año de publicación
2011
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
With new data from the Galactic O-Star Spectroscopic Survey, we confirm and expand the ONn category of late-O, nitrogen-enriched (N), rapidly rotating (n) giants. In particular, we have discovered two "clones" (HD 102415 and HD 117490) of one of the most rapidly rotating O stars previously known (HD 191423, "Howarth's Star"). We compare the locations of these objects in the theoretical HR Diagram to those of slowly rotating ON dwarfs and supergiants. All ON giants known to date are rapid rotators, whereas no ON dwarf or supergiant is; but all ON stars are small fractions of their respective spectral-type/luminosity-class/rotational subcategories. The ONn giants, displaying both substantial processed material and high rotation at an intermediate evolutionary stage, may provide significant information about the development of those properties. They may have preserved high initial rotational velocities or been spun up by TAMS core contraction; but alternatively and perhaps more likely, they may be products of binary mass transfer. At least some of them are also runaway stars.
Facultad de Ciencias Astronómicas y Geofísicas
Instituto de Astrofísica de La Plata
Materia
Ciencias Astronómicas
stars: abundances
stars: early-type
stars: evolution
stars: fundamental parameters
stars: rotation
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by/3.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/131381

id SEDICI_750c9c3d2a26d0257591e9f9f6e522d5
oai_identifier_str oai:sedici.unlp.edu.ar:10915/131381
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Further Results from the Galactic O-Star Spectroscopic Survey: Rapidly Rotating Late ON GiantsWalborn, Nolan RevereMaíz Apellániz, JesúsSota, AlfredoAlfaro, Emilio J.Morrell, Nidia IreneBarbá, Rodolfo HéctorArias, Julia InésGamen, Roberto ClaudioCiencias Astronómicasstars: abundancesstars: early-typestars: evolutionstars: fundamental parametersstars: rotationWith new data from the Galactic O-Star Spectroscopic Survey, we confirm and expand the ONn category of late-O, nitrogen-enriched (N), rapidly rotating (n) giants. In particular, we have discovered two "clones" (HD 102415 and HD 117490) of one of the most rapidly rotating O stars previously known (HD 191423, "Howarth's Star"). We compare the locations of these objects in the theoretical HR Diagram to those of slowly rotating ON dwarfs and supergiants. All ON giants known to date are rapid rotators, whereas no ON dwarf or supergiant is; but all ON stars are small fractions of their respective spectral-type/luminosity-class/rotational subcategories. The ONn giants, displaying both substantial processed material and high rotation at an intermediate evolutionary stage, may provide significant information about the development of those properties. They may have preserved high initial rotational velocities or been spun up by TAMS core contraction; but alternatively and perhaps more likely, they may be products of binary mass transfer. At least some of them are also runaway stars.Facultad de Ciencias Astronómicas y GeofísicasInstituto de Astrofísica de La Plata2011-09-28info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://sedici.unlp.edu.ar/handle/10915/131381enginfo:eu-repo/semantics/altIdentifier/issn/0004-6256info:eu-repo/semantics/altIdentifier/issn/1538-3881info:eu-repo/semantics/altIdentifier/arxiv/1109.0515info:eu-repo/semantics/altIdentifier/doi/10.1088/0004-6256/142/5/150info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/3.0/Creative Commons Attribution 3.0 Unported (CC BY 3.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:31:17Zoai:sedici.unlp.edu.ar:10915/131381Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:31:17.734SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Further Results from the Galactic O-Star Spectroscopic Survey: Rapidly Rotating Late ON Giants
title Further Results from the Galactic O-Star Spectroscopic Survey: Rapidly Rotating Late ON Giants
spellingShingle Further Results from the Galactic O-Star Spectroscopic Survey: Rapidly Rotating Late ON Giants
Walborn, Nolan Revere
Ciencias Astronómicas
stars: abundances
stars: early-type
stars: evolution
stars: fundamental parameters
stars: rotation
title_short Further Results from the Galactic O-Star Spectroscopic Survey: Rapidly Rotating Late ON Giants
title_full Further Results from the Galactic O-Star Spectroscopic Survey: Rapidly Rotating Late ON Giants
title_fullStr Further Results from the Galactic O-Star Spectroscopic Survey: Rapidly Rotating Late ON Giants
title_full_unstemmed Further Results from the Galactic O-Star Spectroscopic Survey: Rapidly Rotating Late ON Giants
title_sort Further Results from the Galactic O-Star Spectroscopic Survey: Rapidly Rotating Late ON Giants
dc.creator.none.fl_str_mv Walborn, Nolan Revere
Maíz Apellániz, Jesús
Sota, Alfredo
Alfaro, Emilio J.
Morrell, Nidia Irene
Barbá, Rodolfo Héctor
Arias, Julia Inés
Gamen, Roberto Claudio
author Walborn, Nolan Revere
author_facet Walborn, Nolan Revere
Maíz Apellániz, Jesús
Sota, Alfredo
Alfaro, Emilio J.
Morrell, Nidia Irene
Barbá, Rodolfo Héctor
Arias, Julia Inés
Gamen, Roberto Claudio
author_role author
author2 Maíz Apellániz, Jesús
Sota, Alfredo
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: abundances
stars: early-type
stars: evolution
stars: fundamental parameters
stars: rotation
topic Ciencias Astronómicas
stars: abundances
stars: early-type
stars: evolution
stars: fundamental parameters
stars: rotation
dc.description.none.fl_txt_mv With new data from the Galactic O-Star Spectroscopic Survey, we confirm and expand the ONn category of late-O, nitrogen-enriched (N), rapidly rotating (n) giants. In particular, we have discovered two "clones" (HD 102415 and HD 117490) of one of the most rapidly rotating O stars previously known (HD 191423, "Howarth's Star"). We compare the locations of these objects in the theoretical HR Diagram to those of slowly rotating ON dwarfs and supergiants. All ON giants known to date are rapid rotators, whereas no ON dwarf or supergiant is; but all ON stars are small fractions of their respective spectral-type/luminosity-class/rotational subcategories. The ONn giants, displaying both substantial processed material and high rotation at an intermediate evolutionary stage, may provide significant information about the development of those properties. They may have preserved high initial rotational velocities or been spun up by TAMS core contraction; but alternatively and perhaps more likely, they may be products of binary mass transfer. At least some of them are also runaway stars.
Facultad de Ciencias Astronómicas y Geofísicas
Instituto de Astrofísica de La Plata
description With new data from the Galactic O-Star Spectroscopic Survey, we confirm and expand the ONn category of late-O, nitrogen-enriched (N), rapidly rotating (n) giants. In particular, we have discovered two "clones" (HD 102415 and HD 117490) of one of the most rapidly rotating O stars previously known (HD 191423, "Howarth's Star"). We compare the locations of these objects in the theoretical HR Diagram to those of slowly rotating ON dwarfs and supergiants. All ON giants known to date are rapid rotators, whereas no ON dwarf or supergiant is; but all ON stars are small fractions of their respective spectral-type/luminosity-class/rotational subcategories. The ONn giants, displaying both substantial processed material and high rotation at an intermediate evolutionary stage, may provide significant information about the development of those properties. They may have preserved high initial rotational velocities or been spun up by TAMS core contraction; but alternatively and perhaps more likely, they may be products of binary mass transfer. At least some of them are also runaway stars.
publishDate 2011
dc.date.none.fl_str_mv 2011-09-28
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/10915/131381
url http://sedici.unlp.edu.ar/handle/10915/131381
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0004-6256
info:eu-repo/semantics/altIdentifier/issn/1538-3881
info:eu-repo/semantics/altIdentifier/arxiv/1109.0515
info:eu-repo/semantics/altIdentifier/doi/10.1088/0004-6256/142/5/150
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/3.0/
Creative Commons Attribution 3.0 Unported (CC BY 3.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by/3.0/
Creative Commons Attribution 3.0 Unported (CC BY 3.0)
dc.format.none.fl_str_mv application/pdf
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
_version_ 1844616192473432065
score 13.070432