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 F.; Arias, Julia I.; Levato, Orlando H.; Grosso, Monica G.; Morrell, Nidia I.; Gamen, Roberto C.; Wallerstein, G.; Niemela, Virpi S.
Año de publicación: 2018
Idioma: inglés
Tipo de recurso: artículo
Estado: versión publicada
Descripción: 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.
Fil: Corcoran, Michael. 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 F. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina
Fil: Gonzalez, Jorge F. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Complejo Astronómico ; Argentina
Fil: Arias, Julia I. Universidad de La Serena; Chile
Fil: Levato, Orlando H. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Complejo Astronómico ; Argentina
Fil: Grosso, Monica G. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Complejo Astronómico ; Argentina
Fil: Morrell, Nidia I. Las Campanas Observatory; Chile
Fil: Gamen, Roberto C. 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 S. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina
Fil: Albacete Colombo, Juan F. Universidad Nacional de Río Negro; Argentina
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.
Materia: Ciencias Exactas y Naturales
Stars
Eta Carinae
Binary Stars
Ciencias Exactas y Naturales
Nivel de accesibilidad: acceso abierto
Condiciones de uso: https://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
Institución: Universidad Nacional de Río Negro
OAI Identificador: oai:rid.unrn.edu.ar:20.500.12049/2505

Acceder

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spelling	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 F.Arias, Julia I.Levato, Orlando H.Grosso, Monica G.Morrell, Nidia I.Gamen, Roberto C.Wallerstein, G.Niemela, Virpi S.Ciencias Exactas y NaturalesStarsEta CarinaeBinary StarsCiencias Exactas y NaturalesFil: Damineli, A. Universidade de Sao Paulo; BrasilFil: Hillier, D. J. University of Pittsburgh; Estados UnidosFil: Corcoran, Michael. National Aeronautics and Space Administration; Estados Unidos.Fil: Corcoran, Michael. 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 F. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; ArgentinaFil: Gonzalez, Jorge F. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Complejo Astronómico ; ArgentinaFil: Arias, Julia I. Universidad de La Serena; ChileFil: Levato, Orlando H. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Complejo Astronómico ; ArgentinaFil: Grosso, Monica G. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Complejo Astronómico ; ArgentinaFil: Morrell, Nidia I. Las Campanas Observatory; ChileFil: Gamen, Roberto C. 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 S. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; ArgentinaFil: Albacete Colombo, Juan F. Universidad Nacional de Río Negro; ArgentinaExtensive 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.Wiley Blackwell Publishing, Inc2018-05-30info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfDamineli, A., Hillier, D. J., Corcoran, Michael, Stahl, O....& Levenhagen, R. S. (2018). The periodicity of the Eta Carinae events; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society0035-87111365-2966https://academic.oup.com/mnras/article/384/4/1649/960649https://rid.unrn.edu.ar/jspui/handle/20.500.12049/2505http://dx.doi.org/10.1111/j.1365-2966.2007.12815.xhttp://hdl.handle.net/11336/46638eng384Monthly Notices of the Royal Astronomical Societyinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/4.0/reponame:RID-UNRN (UNRN)instname:Universidad Nacional de Río Negro2025-09-04T11:12:47Zoai:rid.unrn.edu.ar:20.500.12049/2505instacron:UNRNInstitucionalhttps://rid.unrn.edu.ar/jspui/Universidad públicaNo correspondehttps://rid.unrn.edu.ar/oai/snrdrid@unrn.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:43692025-09-04 11:12:47.7RID-UNRN (UNRN) - Universidad Nacional de Río Negrofalse
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. Ciencias Exactas y Naturales Stars Eta Carinae Binary Stars Ciencias Exactas y Naturales
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 F. Arias, Julia I. Levato, Orlando H. Grosso, Monica G. Morrell, Nidia I. Gamen, Roberto C. Wallerstein, G. Niemela, Virpi S.
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 F. Arias, Julia I. Levato, Orlando H. Grosso, Monica G. Morrell, Nidia I. Gamen, Roberto C. Wallerstein, G. Niemela, Virpi S.
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 F. Arias, Julia I. Levato, Orlando H. Grosso, Monica G. Morrell, Nidia I. Gamen, Roberto C. Wallerstein, G. Niemela, Virpi S.
author2_role	author author author author author author author author author author author author author author author author
dc.subject.none.fl_str_mv	Ciencias Exactas y Naturales Stars Eta Carinae Binary Stars Ciencias Exactas y Naturales
topic	Ciencias Exactas y Naturales Stars Eta Carinae Binary Stars Ciencias Exactas y Naturales
dc.description.none.fl_txt_mv	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. Fil: Corcoran, Michael. 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 F. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina Fil: Gonzalez, Jorge F. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Complejo Astronómico ; Argentina Fil: Arias, Julia I. Universidad de La Serena; Chile Fil: Levato, Orlando H. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Complejo Astronómico ; Argentina Fil: Grosso, Monica G. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Complejo Astronómico ; Argentina Fil: Morrell, Nidia I. Las Campanas Observatory; Chile Fil: Gamen, Roberto C. 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 S. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina Fil: Albacete Colombo, Juan F. Universidad Nacional de Río Negro; Argentina 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.
description	Fil: Damineli, A. Universidade de Sao Paulo; Brasil
publishDate	2018
dc.date.none.fl_str_mv	2018-05-30
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	Damineli, A., Hillier, D. J., Corcoran, Michael, Stahl, O....& Levenhagen, R. S. (2018). The periodicity of the Eta Carinae events; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society 0035-8711 1365-2966 https://academic.oup.com/mnras/article/384/4/1649/960649 https://rid.unrn.edu.ar/jspui/handle/20.500.12049/2505 http://dx.doi.org/10.1111/j.1365-2966.2007.12815.x http://hdl.handle.net/11336/46638
identifier_str_mv	Damineli, A., Hillier, D. J., Corcoran, Michael, Stahl, O....& Levenhagen, R. S. (2018). The periodicity of the Eta Carinae events; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society 0035-8711 1365-2966
url	https://academic.oup.com/mnras/article/384/4/1649/960649 https://rid.unrn.edu.ar/jspui/handle/20.500.12049/2505 http://dx.doi.org/10.1111/j.1365-2966.2007.12815.x http://hdl.handle.net/11336/46638
dc.language.none.fl_str_mv	eng
language	eng
dc.relation.none.fl_str_mv	384 Monthly Notices of the Royal Astronomical Society
dc.rights.none.fl_str_mv	info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/4.0/
eu_rights_str_mv	openAccess
rights_invalid_str_mv	https://creativecommons.org/licenses/by-nc-sa/4.0/
dc.format.none.fl_str_mv	application/pdf
dc.publisher.none.fl_str_mv	Wiley Blackwell Publishing, Inc
publisher.none.fl_str_mv	Wiley Blackwell Publishing, Inc
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The periodicity of the Eta Carinae events

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