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
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/131381
Ver los metadatos del registro completo
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 |