The H-alpha variations of Eta Carinae during the 2009.0 spectroscopic event

Autores
Richardson, N. D.; Gies, D. R.; Henry, T. J.; Fernandez Lajus, Eduardo Eusebio; Okazaki, A. T.
Año de publicación
2010
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We report on H-alpha spectroscopy of the 2009.0 spectroscopic event of eta Carinae collected via SMARTS observations using the CTIO 1.5 m telescope and echelle spectrograph. Our observations were made almost every night over a two month interval around the predicted minimum of eta Car. We observed a significant fading of the line emission that reached a minimum seven days after the X-ray minimum. About 17 d prior to the H-alpha flux minimum, the H-alpha profile exhibited the emergence of a broad, P Cygni type, absorption component (near a Doppler shift of -500 km/s) and a narrow absorption component (near -144 km/s and probably associated with intervening gas from the Little Homunculus Nebula). All these features were observed during the last event in 2003.5 and are probably related to the close periastron passage of the companion. We argue that these variations are consistent with qualitative expectations about changes in the primary star´s stellar wind that result from the wind-wind collision with a massive binary companion and from atmospheric eclipses of the companion.
Fil: Richardson, N. D. . Georgia State University; Estados Unidos
Fil: Gies, D. R. . Georgia State University; Estados Unidos
Fil: Henry, T. J. . Georgia State University; Estados Unidos
Fil: Fernandez Lajus, Eduardo Eusebio. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Okazaki, A. T. . Hokkai-Gakuen University. Faculty of Engineering; Japón
Materia
Early Type Stars
Eta Carinae (Estrella)
Star Winds
Outflows
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:11336/9954
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/9954
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling The H-alpha variations of Eta Carinae during the 2009.0 spectroscopic eventRichardson, N. D. Gies, D. R. Henry, T. J. Fernandez Lajus, Eduardo EusebioOkazaki, A. T. Early Type StarsEta Carinae (Estrella)Star WindsOutflowshttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We report on H-alpha spectroscopy of the 2009.0 spectroscopic event of eta Carinae collected via SMARTS observations using the CTIO 1.5 m telescope and echelle spectrograph. Our observations were made almost every night over a two month interval around the predicted minimum of eta Car. We observed a significant fading of the line emission that reached a minimum seven days after the X-ray minimum. About 17 d prior to the H-alpha flux minimum, the H-alpha profile exhibited the emergence of a broad, P Cygni type, absorption component (near a Doppler shift of -500 km/s) and a narrow absorption component (near -144 km/s and probably associated with intervening gas from the Little Homunculus Nebula). All these features were observed during the last event in 2003.5 and are probably related to the close periastron passage of the companion. We argue that these variations are consistent with qualitative expectations about changes in the primary star´s stellar wind that result from the wind-wind collision with a massive binary companion and from atmospheric eclipses of the companion.Fil: Richardson, N. D. . Georgia State University; Estados UnidosFil: Gies, D. R. . Georgia State University; Estados UnidosFil: Henry, T. J. . Georgia State University; Estados UnidosFil: Fernandez Lajus, Eduardo Eusebio. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Okazaki, A. T. . Hokkai-Gakuen University. Faculty of Engineering; JapónIop Publishing2010-04info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/9954Richardson, N. D. ; Gies, D. R. ; Henry, T. J. ; Fernandez Lajus, Eduardo Eusebio; Okazaki, A. T. ; The H-alpha variations of Eta Carinae during the 2009.0 spectroscopic event; Iop Publishing; Astronomical Journal; 139; 4; 4-2010; 1534-15410004-6256enginfo:eu-repo/semantics/altIdentifier/doi/10.1088/0004-6256/139/4/1534info:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/article/10.1088/0004-6256/139/4/1534/metainfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:02:14Zoai:ri.conicet.gov.ar:11336/9954instacron: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:34982025-09-03 10:02:15.188CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv The H-alpha variations of Eta Carinae during the 2009.0 spectroscopic event
title The H-alpha variations of Eta Carinae during the 2009.0 spectroscopic event
spellingShingle The H-alpha variations of Eta Carinae during the 2009.0 spectroscopic event
Richardson, N. D.
Early Type Stars
Eta Carinae (Estrella)
Star Winds
Outflows
title_short The H-alpha variations of Eta Carinae during the 2009.0 spectroscopic event
title_full The H-alpha variations of Eta Carinae during the 2009.0 spectroscopic event
title_fullStr The H-alpha variations of Eta Carinae during the 2009.0 spectroscopic event
title_full_unstemmed The H-alpha variations of Eta Carinae during the 2009.0 spectroscopic event
title_sort The H-alpha variations of Eta Carinae during the 2009.0 spectroscopic event
dc.creator.none.fl_str_mv Richardson, N. D.
Gies, D. R.
Henry, T. J.
Fernandez Lajus, Eduardo Eusebio
Okazaki, A. T.
author Richardson, N. D.
author_facet Richardson, N. D.
Gies, D. R.
Henry, T. J.
Fernandez Lajus, Eduardo Eusebio
Okazaki, A. T.
author_role author
author2 Gies, D. R.
Henry, T. J.
Fernandez Lajus, Eduardo Eusebio
Okazaki, A. T.
author2_role author
author
author
author
dc.subject.none.fl_str_mv Early Type Stars
Eta Carinae (Estrella)
Star Winds
Outflows
topic Early Type Stars
Eta Carinae (Estrella)
Star Winds
Outflows
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We report on H-alpha spectroscopy of the 2009.0 spectroscopic event of eta Carinae collected via SMARTS observations using the CTIO 1.5 m telescope and echelle spectrograph. Our observations were made almost every night over a two month interval around the predicted minimum of eta Car. We observed a significant fading of the line emission that reached a minimum seven days after the X-ray minimum. About 17 d prior to the H-alpha flux minimum, the H-alpha profile exhibited the emergence of a broad, P Cygni type, absorption component (near a Doppler shift of -500 km/s) and a narrow absorption component (near -144 km/s and probably associated with intervening gas from the Little Homunculus Nebula). All these features were observed during the last event in 2003.5 and are probably related to the close periastron passage of the companion. We argue that these variations are consistent with qualitative expectations about changes in the primary star´s stellar wind that result from the wind-wind collision with a massive binary companion and from atmospheric eclipses of the companion.
Fil: Richardson, N. D. . Georgia State University; Estados Unidos
Fil: Gies, D. R. . Georgia State University; Estados Unidos
Fil: Henry, T. J. . Georgia State University; Estados Unidos
Fil: Fernandez Lajus, Eduardo Eusebio. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Okazaki, A. T. . Hokkai-Gakuen University. Faculty of Engineering; Japón
description We report on H-alpha spectroscopy of the 2009.0 spectroscopic event of eta Carinae collected via SMARTS observations using the CTIO 1.5 m telescope and echelle spectrograph. Our observations were made almost every night over a two month interval around the predicted minimum of eta Car. We observed a significant fading of the line emission that reached a minimum seven days after the X-ray minimum. About 17 d prior to the H-alpha flux minimum, the H-alpha profile exhibited the emergence of a broad, P Cygni type, absorption component (near a Doppler shift of -500 km/s) and a narrow absorption component (near -144 km/s and probably associated with intervening gas from the Little Homunculus Nebula). All these features were observed during the last event in 2003.5 and are probably related to the close periastron passage of the companion. We argue that these variations are consistent with qualitative expectations about changes in the primary star´s stellar wind that result from the wind-wind collision with a massive binary companion and from atmospheric eclipses of the companion.
publishDate 2010
dc.date.none.fl_str_mv 2010-04
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/11336/9954
Richardson, N. D. ; Gies, D. R. ; Henry, T. J. ; Fernandez Lajus, Eduardo Eusebio; Okazaki, A. T. ; The H-alpha variations of Eta Carinae during the 2009.0 spectroscopic event; Iop Publishing; Astronomical Journal; 139; 4; 4-2010; 1534-1541
0004-6256
url http://hdl.handle.net/11336/9954
identifier_str_mv Richardson, N. D. ; Gies, D. R. ; Henry, T. J. ; Fernandez Lajus, Eduardo Eusebio; Okazaki, A. T. ; The H-alpha variations of Eta Carinae during the 2009.0 spectroscopic event; Iop Publishing; Astronomical Journal; 139; 4; 4-2010; 1534-1541
0004-6256
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1088/0004-6256/139/4/1534
info:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/article/10.1088/0004-6256/139/4/1534/meta
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 Iop Publishing
publisher.none.fl_str_mv Iop Publishing
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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score 13.13397

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