A multispectral view of the periodic events in Eta Carinae
- Autores
- Damineli, A.; Hillier, D. J.; Corcoran, Michael; Stahl, O.; Groh, J. H.; Arias, Julia Ines; Teodoro, M.; Morrell, Nidia Irene; Gamen, Roberto Claudio; Gonzalez, Jorge Federico; Leister, N. V.; Levato, Orlando Hugo; Levenhagen, R. S.; Grosso, Monica Gladys; Albacete Colombo, Juan Facundo; Wallerstein, G.
- Año de publicación
- 2008
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- A full description of the 5.5-yr low excitation events in η Carinae is presented. We show that they are not as simple and brief as previously thought, but a combination of two components. The first, the slow variation component, is revealed by slow changes in the ionization level of circumstellar matter across the whole cycle and is caused by gradual changes in the wind– wind collision shock-cone orientation, angular opening and gaseous content. The second, the collapse component, is restricted to around the minimum, and is due to a temporary global collapse of the wind–wind collision shock. High-energy photons (E > 16 eV) from the companion star are strongly shielded, leaving the Weigelt objects at low-ionization state for more than six months. High-energy phenomena are sensitive only to the collapse, low energy only to the slow variation and intermediate energies to both components. Simple eclipses and mechanisms effective only near periastron (e.g. shell ejection or accretion on to the secondary star) cannot account for the whole 5.5-yr cycle. We find anti-correlated changes in the intensity and the radial velocity of P Cygni absorption profiles in Fe II λ6455 and He I λ7065 lines, indicating that the former is associated to the primary and the latter to the secondary star. We present a set of light curves representative of the whole spectrum, useful for monitoring the next event (2009 January 11).
Fil: Damineli, A.. Universidade de Sao Paulo; Brasil
Fil: Hillier, D. J.. University of Pittsburgh; Estados Unidos
Fil: Corcoran, Michael. CRESST and X-ray Astrophysics Laboratory; Estados Unidos
Fil: Stahl, O.. Zentrum für Astronomie. Landessternwarte; Alemania
Fil: Groh, J. H.. Universidade de Sao Paulo; Brasil
Fil: Arias, Julia Ines. Univerisad de La Serena; Chile
Fil: Teodoro, M.. Universidade de Sao Paulo; Brasil
Fil: Morrell, Nidia Irene. Las Campanas Observatory; Chile
Fil: Gamen, Roberto Claudio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Complejo Astronómico ; Argentina
Fil: Gonzalez, Jorge Federico. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Complejo Astronómico ; Argentina
Fil: Leister, N. V.. Universidade de Sao Paulo; Brasil
Fil: Levato, Orlando Hugo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Complejo Astronómico ; Argentina
Fil: Levenhagen, R. S.. Universidade de Sao Paulo; Brasil
Fil: Grosso, Monica Gladys. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Complejo Astronómico ; Argentina
Fil: Albacete Colombo, Juan Facundo. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina
Fil: Wallerstein, G.. University of Washington; Estados Unidos - Materia
-
Stars
Eta Carinae - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
.jpg)
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/44112
Ver los metadatos del registro completo
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A multispectral view of the periodic events in Eta CarinaeDamineli, A.Hillier, D. J.Corcoran, MichaelStahl, O.Groh, J. H.Arias, Julia InesTeodoro, M.Morrell, Nidia IreneGamen, Roberto ClaudioGonzalez, Jorge FedericoLeister, N. V.Levato, Orlando HugoLevenhagen, R. S.Grosso, Monica GladysAlbacete Colombo, Juan FacundoWallerstein, G.StarsEta Carinaehttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1A full description of the 5.5-yr low excitation events in η Carinae is presented. We show that they are not as simple and brief as previously thought, but a combination of two components. The first, the slow variation component, is revealed by slow changes in the ionization level of circumstellar matter across the whole cycle and is caused by gradual changes in the wind– wind collision shock-cone orientation, angular opening and gaseous content. The second, the collapse component, is restricted to around the minimum, and is due to a temporary global collapse of the wind–wind collision shock. High-energy photons (E > 16 eV) from the companion star are strongly shielded, leaving the Weigelt objects at low-ionization state for more than six months. High-energy phenomena are sensitive only to the collapse, low energy only to the slow variation and intermediate energies to both components. Simple eclipses and mechanisms effective only near periastron (e.g. shell ejection or accretion on to the secondary star) cannot account for the whole 5.5-yr cycle. We find anti-correlated changes in the intensity and the radial velocity of P Cygni absorption profiles in Fe II λ6455 and He I λ7065 lines, indicating that the former is associated to the primary and the latter to the secondary star. We present a set of light curves representative of the whole spectrum, useful for monitoring the next event (2009 January 11).Fil: Damineli, A.. Universidade de Sao Paulo; BrasilFil: Hillier, D. J.. University of Pittsburgh; Estados UnidosFil: Corcoran, Michael. CRESST and X-ray Astrophysics Laboratory; Estados UnidosFil: Stahl, O.. Zentrum für Astronomie. Landessternwarte; AlemaniaFil: Groh, J. H.. Universidade de Sao Paulo; BrasilFil: Arias, Julia Ines. Univerisad de La Serena; ChileFil: Teodoro, M.. Universidade de Sao Paulo; BrasilFil: Morrell, Nidia Irene. Las Campanas Observatory; ChileFil: Gamen, Roberto Claudio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Complejo Astronómico ; ArgentinaFil: Gonzalez, Jorge Federico. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Complejo Astronómico ; ArgentinaFil: Leister, N. V.. Universidade de Sao Paulo; BrasilFil: Levato, Orlando Hugo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Complejo Astronómico ; ArgentinaFil: Levenhagen, R. S.. Universidade de Sao Paulo; BrasilFil: Grosso, Monica Gladys. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Complejo Astronómico ; ArgentinaFil: Albacete Colombo, Juan Facundo. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; ArgentinaFil: Wallerstein, G.. University of Washington; Estados UnidosWiley Blackwell Publishing, Inc2008-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/44112Damineli, A.; Hillier, D. J.; Corcoran, Michael; Stahl, O.; Groh, J. H.; et al.; A multispectral view of the periodic events in Eta Carinae; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 386; 4; 6-2008; 2330-23440035-8711CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1111/j.1365-2966.2008.13214.xinfo:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article/386/4/2330/1468103info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:54:18Zoai:ri.conicet.gov.ar:11336/44112instacron: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 09:54:19.212CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
| dc.title.none.fl_str_mv |
A multispectral view of the periodic events in Eta Carinae |
| title |
A multispectral view of the periodic events in Eta Carinae |
| spellingShingle |
A multispectral view of the periodic events in Eta Carinae Damineli, A. Stars Eta Carinae |
| title_short |
A multispectral view of the periodic events in Eta Carinae |
| title_full |
A multispectral view of the periodic events in Eta Carinae |
| title_fullStr |
A multispectral view of the periodic events in Eta Carinae |
| title_full_unstemmed |
A multispectral view of the periodic events in Eta Carinae |
| title_sort |
A multispectral view of the periodic events in Eta Carinae |
| dc.creator.none.fl_str_mv |
Damineli, A. Hillier, D. J. Corcoran, Michael Stahl, O. Groh, J. H. Arias, Julia Ines Teodoro, M. Morrell, Nidia Irene Gamen, Roberto Claudio Gonzalez, Jorge Federico Leister, N. V. Levato, Orlando Hugo Levenhagen, R. S. Grosso, Monica Gladys Albacete Colombo, Juan Facundo Wallerstein, G. |
| author |
Damineli, A. |
| author_facet |
Damineli, A. Hillier, D. J. Corcoran, Michael Stahl, O. Groh, J. H. Arias, Julia Ines Teodoro, M. Morrell, Nidia Irene Gamen, Roberto Claudio Gonzalez, Jorge Federico Leister, N. V. Levato, Orlando Hugo Levenhagen, R. S. Grosso, Monica Gladys Albacete Colombo, Juan Facundo Wallerstein, G. |
| author_role |
author |
| author2 |
Hillier, D. J. Corcoran, Michael Stahl, O. Groh, J. H. Arias, Julia Ines Teodoro, M. Morrell, Nidia Irene Gamen, Roberto Claudio Gonzalez, Jorge Federico Leister, N. V. Levato, Orlando Hugo Levenhagen, R. S. Grosso, Monica Gladys Albacete Colombo, Juan Facundo Wallerstein, G. |
| author2_role |
author author author author author author author author author author author author author author author |
| dc.subject.none.fl_str_mv |
Stars Eta Carinae |
| topic |
Stars Eta Carinae |
| purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
| dc.description.none.fl_txt_mv |
A full description of the 5.5-yr low excitation events in η Carinae is presented. We show that they are not as simple and brief as previously thought, but a combination of two components. The first, the slow variation component, is revealed by slow changes in the ionization level of circumstellar matter across the whole cycle and is caused by gradual changes in the wind– wind collision shock-cone orientation, angular opening and gaseous content. The second, the collapse component, is restricted to around the minimum, and is due to a temporary global collapse of the wind–wind collision shock. High-energy photons (E > 16 eV) from the companion star are strongly shielded, leaving the Weigelt objects at low-ionization state for more than six months. High-energy phenomena are sensitive only to the collapse, low energy only to the slow variation and intermediate energies to both components. Simple eclipses and mechanisms effective only near periastron (e.g. shell ejection or accretion on to the secondary star) cannot account for the whole 5.5-yr cycle. We find anti-correlated changes in the intensity and the radial velocity of P Cygni absorption profiles in Fe II λ6455 and He I λ7065 lines, indicating that the former is associated to the primary and the latter to the secondary star. We present a set of light curves representative of the whole spectrum, useful for monitoring the next event (2009 January 11). Fil: Damineli, A.. Universidade de Sao Paulo; Brasil Fil: Hillier, D. J.. University of Pittsburgh; Estados Unidos Fil: Corcoran, Michael. CRESST and X-ray Astrophysics Laboratory; Estados Unidos Fil: Stahl, O.. Zentrum für Astronomie. Landessternwarte; Alemania Fil: Groh, J. H.. Universidade de Sao Paulo; Brasil Fil: Arias, Julia Ines. Univerisad de La Serena; Chile Fil: Teodoro, M.. Universidade de Sao Paulo; Brasil Fil: Morrell, Nidia Irene. Las Campanas Observatory; Chile Fil: Gamen, Roberto Claudio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Complejo Astronómico ; Argentina Fil: Gonzalez, Jorge Federico. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Complejo Astronómico ; Argentina Fil: Leister, N. V.. Universidade de Sao Paulo; Brasil Fil: Levato, Orlando Hugo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Complejo Astronómico ; Argentina Fil: Levenhagen, R. S.. Universidade de Sao Paulo; Brasil Fil: Grosso, Monica Gladys. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Complejo Astronómico ; Argentina Fil: Albacete Colombo, Juan Facundo. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina Fil: Wallerstein, G.. University of Washington; Estados Unidos |
| description |
A full description of the 5.5-yr low excitation events in η Carinae is presented. We show that they are not as simple and brief as previously thought, but a combination of two components. The first, the slow variation component, is revealed by slow changes in the ionization level of circumstellar matter across the whole cycle and is caused by gradual changes in the wind– wind collision shock-cone orientation, angular opening and gaseous content. The second, the collapse component, is restricted to around the minimum, and is due to a temporary global collapse of the wind–wind collision shock. High-energy photons (E > 16 eV) from the companion star are strongly shielded, leaving the Weigelt objects at low-ionization state for more than six months. High-energy phenomena are sensitive only to the collapse, low energy only to the slow variation and intermediate energies to both components. Simple eclipses and mechanisms effective only near periastron (e.g. shell ejection or accretion on to the secondary star) cannot account for the whole 5.5-yr cycle. We find anti-correlated changes in the intensity and the radial velocity of P Cygni absorption profiles in Fe II λ6455 and He I λ7065 lines, indicating that the former is associated to the primary and the latter to the secondary star. We present a set of light curves representative of the whole spectrum, useful for monitoring the next event (2009 January 11). |
| publishDate |
2008 |
| dc.date.none.fl_str_mv |
2008-06 |
| 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/11336/44112 Damineli, A.; Hillier, D. J.; Corcoran, Michael; Stahl, O.; Groh, J. H.; et al.; A multispectral view of the periodic events in Eta Carinae; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 386; 4; 6-2008; 2330-2344 0035-8711 CONICET Digital CONICET |
| url |
http://hdl.handle.net/11336/44112 |
| identifier_str_mv |
Damineli, A.; Hillier, D. J.; Corcoran, Michael; Stahl, O.; Groh, J. H.; et al.; A multispectral view of the periodic events in Eta Carinae; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 386; 4; 6-2008; 2330-2344 0035-8711 CONICET Digital CONICET |
| dc.language.none.fl_str_mv |
eng |
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eng |
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info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1365-2966.2008.13214.x info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article/386/4/2330/1468103 |
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openAccess |
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application/pdf application/pdf application/pdf application/pdf application/pdf application/pdf application/pdf |
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Wiley Blackwell Publishing, Inc |
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Wiley Blackwell Publishing, Inc |
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CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
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dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
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