The periodicity of the Eta Carinae events
- Autores
- Damineli, A.; Hillier, D. J.; Corcoran, Michael; Stahl, O.; Levenhagen, R. S.; Leister, N. V.; Groh, J. H.; Teodoro, M.; Albacete Colombo, Juan Facundo; Gonzalez, Jorge Federico; Arias, Julia Ines; Levato, Orlando Hugo; Grosso, Monica Gladys; Morrell, Nidia Irene; Gamen, Roberto Claudio; Wallerstein, G.; Niemela, Virpi Sinikka
- Año de publicación
- 2008
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Extensive spectral observations of η Carinae over the last cycle, and particularly around the 2003.5 low-excitation event, have been obtained. The variability of both narrow and broad lines, when combined with data taken from two earlier cycles, reveal a common and welldefined period. We have combined the cycle lengths derived from the many lines in the optical spectrum with those from broad-band X-rays, optical and near-infrared observations, and obtained a period length of Ppres = 2022.7 ± 1.3 d. Spectroscopic data collected during the last 60 yr yield an average period of Pavg = 2020 ± 4 d, consistent with the present-day period. The period cannot have changed by more than P/P = 0.0007 since 1948. This confirms the previous claims of a true, stable periodicity, and gives strong support to the binary scenario. We have used the disappearance of the narrow component of He I 6678 to define the epoch of the Cycle 11 minimum, T0 = JD 245 2819.8. The next event is predicted to occur on 2009 January 11 (±2 d). The dates for the start of the minimum in other spectral features and broad-bands are very close to this date, and have well-determined time-delays from the He I epoch.
Fil: Damineli, A.. Universidade de Sao Paulo; Brasil
Fil: Hillier, D. J.. University of Pittsburgh; Estados Unidos
Fil: Corcoran, Michael. National Aeronautics and Space Administration; Estados Unidos. CRESST and X-ray Astrophysics Laboratory; Estados Unidos
Fil: Stahl, O.. Zentrum für Astronomie. Universität Heidelberg; Alemania
Fil: Levenhagen, R. S.. Universidade de Sao Paulo; Brasil
Fil: Leister, N. V.. Universidade de Sao Paulo; Brasil
Fil: Groh, J. H.. Universidade de Sao Paulo; Brasil
Fil: Teodoro, M.. Universidade de Sao Paulo; Brasil
Fil: Albacete Colombo, Juan Facundo. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina
Fil: Gonzalez, Jorge Federico. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Complejo Astronómico ; Argentina
Fil: Arias, Julia Ines. Universidad de La Serena; Chile
Fil: Levato, Orlando Hugo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Complejo Astronómico ; Argentina
Fil: Grosso, Monica Gladys. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Complejo Astronómico ; Argentina
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: Wallerstein, G.. University of Washington; Estados Unidos
Fil: Niemela, Virpi Sinikka. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina - Materia
-
Stars
Eta Carinae
Binary stars - 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:11336/46638
Ver los metadatos del registro completo
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The periodicity of the Eta Carinae eventsDamineli, A.Hillier, D. J.Corcoran, MichaelStahl, O.Levenhagen, R. S.Leister, N. V.Groh, J. H.Teodoro, M.Albacete Colombo, Juan FacundoGonzalez, Jorge FedericoArias, Julia InesLevato, Orlando HugoGrosso, Monica GladysMorrell, Nidia IreneGamen, Roberto ClaudioWallerstein, G.Niemela, Virpi SinikkaStarsEta CarinaeBinary starshttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Extensive spectral observations of η Carinae over the last cycle, and particularly around the 2003.5 low-excitation event, have been obtained. The variability of both narrow and broad lines, when combined with data taken from two earlier cycles, reveal a common and welldefined period. We have combined the cycle lengths derived from the many lines in the optical spectrum with those from broad-band X-rays, optical and near-infrared observations, and obtained a period length of Ppres = 2022.7 ± 1.3 d. Spectroscopic data collected during the last 60 yr yield an average period of Pavg = 2020 ± 4 d, consistent with the present-day period. The period cannot have changed by more than P/P = 0.0007 since 1948. This confirms the previous claims of a true, stable periodicity, and gives strong support to the binary scenario. We have used the disappearance of the narrow component of He I 6678 to define the epoch of the Cycle 11 minimum, T0 = JD 245 2819.8. The next event is predicted to occur on 2009 January 11 (±2 d). The dates for the start of the minimum in other spectral features and broad-bands are very close to this date, and have well-determined time-delays from the He I epoch.Fil: Damineli, A.. Universidade de Sao Paulo; BrasilFil: Hillier, D. J.. University of Pittsburgh; Estados UnidosFil: Corcoran, Michael. National Aeronautics and Space Administration; Estados Unidos. CRESST and X-ray Astrophysics Laboratory; Estados UnidosFil: Stahl, O.. Zentrum für Astronomie. Universität Heidelberg; AlemaniaFil: Levenhagen, R. S.. Universidade de Sao Paulo; BrasilFil: Leister, N. V.. Universidade de Sao Paulo; BrasilFil: Groh, J. H.. Universidade de Sao Paulo; BrasilFil: Teodoro, M.. Universidade de Sao Paulo; BrasilFil: Albacete Colombo, Juan Facundo. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; ArgentinaFil: Gonzalez, Jorge Federico. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Complejo Astronómico ; ArgentinaFil: Arias, Julia Ines. Universidad de La Serena; ChileFil: Levato, Orlando Hugo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Complejo Astronómico ; ArgentinaFil: Grosso, Monica Gladys. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Complejo Astronómico ; ArgentinaFil: 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: Wallerstein, G.. University of Washington; Estados UnidosFil: Niemela, Virpi Sinikka. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; ArgentinaWiley Blackwell Publishing, Inc2008-03info: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/11336/46638Damineli, A.; Hillier, D. J.; Corcoran, Michael; Stahl, O.; Levenhagen, R. S.; et al.; The periodicity of the Eta Carinae events; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 384; 4; 3-2008; 1649-16560035-8711CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1111/j.1365-2966.2007.12815.xinfo:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article/384/4/1649/960649info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:04:18Zoai:ri.conicet.gov.ar:11336/46638instacron: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 10:04:19.102CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
| dc.title.none.fl_str_mv |
The periodicity of the Eta Carinae events |
| title |
The periodicity of the Eta Carinae events |
| spellingShingle |
The periodicity of the Eta Carinae events Damineli, A. Stars Eta Carinae Binary stars |
| title_short |
The periodicity of the Eta Carinae events |
| title_full |
The periodicity of the Eta Carinae events |
| title_fullStr |
The periodicity of the Eta Carinae events |
| title_full_unstemmed |
The periodicity of the Eta Carinae events |
| title_sort |
The periodicity of the Eta Carinae events |
| dc.creator.none.fl_str_mv |
Damineli, A. Hillier, D. J. Corcoran, Michael Stahl, O. Levenhagen, R. S. Leister, N. V. Groh, J. H. Teodoro, M. Albacete Colombo, Juan Facundo Gonzalez, Jorge Federico Arias, Julia Ines Levato, Orlando Hugo Grosso, Monica Gladys Morrell, Nidia Irene Gamen, Roberto Claudio Wallerstein, G. Niemela, Virpi Sinikka |
| author |
Damineli, A. |
| author_facet |
Damineli, A. Hillier, D. J. Corcoran, Michael Stahl, O. Levenhagen, R. S. Leister, N. V. Groh, J. H. Teodoro, M. Albacete Colombo, Juan Facundo Gonzalez, Jorge Federico Arias, Julia Ines Levato, Orlando Hugo Grosso, Monica Gladys Morrell, Nidia Irene Gamen, Roberto Claudio Wallerstein, G. Niemela, Virpi Sinikka |
| author_role |
author |
| author2 |
Hillier, D. J. Corcoran, Michael Stahl, O. Levenhagen, R. S. Leister, N. V. Groh, J. H. Teodoro, M. Albacete Colombo, Juan Facundo Gonzalez, Jorge Federico Arias, Julia Ines Levato, Orlando Hugo Grosso, Monica Gladys Morrell, Nidia Irene Gamen, Roberto Claudio Wallerstein, G. Niemela, Virpi Sinikka |
| author2_role |
author author author author author author author author author author author author author author author author |
| dc.subject.none.fl_str_mv |
Stars Eta Carinae Binary stars |
| topic |
Stars Eta Carinae Binary stars |
| purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
| dc.description.none.fl_txt_mv |
Extensive spectral observations of η Carinae over the last cycle, and particularly around the 2003.5 low-excitation event, have been obtained. The variability of both narrow and broad lines, when combined with data taken from two earlier cycles, reveal a common and welldefined period. We have combined the cycle lengths derived from the many lines in the optical spectrum with those from broad-band X-rays, optical and near-infrared observations, and obtained a period length of Ppres = 2022.7 ± 1.3 d. Spectroscopic data collected during the last 60 yr yield an average period of Pavg = 2020 ± 4 d, consistent with the present-day period. The period cannot have changed by more than P/P = 0.0007 since 1948. This confirms the previous claims of a true, stable periodicity, and gives strong support to the binary scenario. We have used the disappearance of the narrow component of He I 6678 to define the epoch of the Cycle 11 minimum, T0 = JD 245 2819.8. The next event is predicted to occur on 2009 January 11 (±2 d). The dates for the start of the minimum in other spectral features and broad-bands are very close to this date, and have well-determined time-delays from the He I epoch. Fil: Damineli, A.. Universidade de Sao Paulo; Brasil Fil: Hillier, D. J.. University of Pittsburgh; Estados Unidos Fil: Corcoran, Michael. National Aeronautics and Space Administration; Estados Unidos. CRESST and X-ray Astrophysics Laboratory; Estados Unidos Fil: Stahl, O.. Zentrum für Astronomie. Universität Heidelberg; Alemania Fil: Levenhagen, R. S.. Universidade de Sao Paulo; Brasil Fil: Leister, N. V.. Universidade de Sao Paulo; Brasil Fil: Groh, J. H.. Universidade de Sao Paulo; Brasil Fil: Teodoro, M.. Universidade de Sao Paulo; Brasil Fil: Albacete Colombo, Juan Facundo. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina Fil: Gonzalez, Jorge Federico. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Complejo Astronómico ; Argentina Fil: Arias, Julia Ines. Universidad de La Serena; Chile Fil: Levato, Orlando Hugo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Complejo Astronómico ; Argentina Fil: Grosso, Monica Gladys. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Complejo Astronómico ; Argentina 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: Wallerstein, G.. University of Washington; Estados Unidos Fil: Niemela, Virpi Sinikka. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina |
| description |
Extensive spectral observations of η Carinae over the last cycle, and particularly around the 2003.5 low-excitation event, have been obtained. The variability of both narrow and broad lines, when combined with data taken from two earlier cycles, reveal a common and welldefined period. We have combined the cycle lengths derived from the many lines in the optical spectrum with those from broad-band X-rays, optical and near-infrared observations, and obtained a period length of Ppres = 2022.7 ± 1.3 d. Spectroscopic data collected during the last 60 yr yield an average period of Pavg = 2020 ± 4 d, consistent with the present-day period. The period cannot have changed by more than P/P = 0.0007 since 1948. This confirms the previous claims of a true, stable periodicity, and gives strong support to the binary scenario. We have used the disappearance of the narrow component of He I 6678 to define the epoch of the Cycle 11 minimum, T0 = JD 245 2819.8. The next event is predicted to occur on 2009 January 11 (±2 d). The dates for the start of the minimum in other spectral features and broad-bands are very close to this date, and have well-determined time-delays from the He I epoch. |
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2008 |
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2008-03 |
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http://hdl.handle.net/11336/46638 Damineli, A.; Hillier, D. J.; Corcoran, Michael; Stahl, O.; Levenhagen, R. S.; et al.; The periodicity of the Eta Carinae events; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 384; 4; 3-2008; 1649-1656 0035-8711 CONICET Digital CONICET |
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http://hdl.handle.net/11336/46638 |
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Damineli, A.; Hillier, D. J.; Corcoran, Michael; Stahl, O.; Levenhagen, R. S.; et al.; The periodicity of the Eta Carinae events; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 384; 4; 3-2008; 1649-1656 0035-8711 CONICET Digital CONICET |
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eng |
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