The eclipsing binary star RZ Cas: Accretion-driven variability of the multimode oscillation spectrum
We analysed photometric time series of the active, semidetached Algol-type system RZ Cas obtained in 1999-2009, in order to search for seasonal and short-term variations in the oscillation spectrum of RZ Cas A. The orbital period shows ±1 s cyclic variations on time-scales of 6-9 years. We detected...
| Autores: | , , , , , , , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2018 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/207431 |
| Acceso en línea: | http://hdl.handle.net/10261/207431 |
| Access Level: | acceso abierto |
| Palabra clave: | Binaries: eclipsing Stars: oscillations |
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| dc.title.none.fl_str_mv |
The eclipsing binary star RZ Cas: Accretion-driven variability of the multimode oscillation spectrum |
| title |
The eclipsing binary star RZ Cas: Accretion-driven variability of the multimode oscillation spectrum |
| spellingShingle |
The eclipsing binary star RZ Cas: Accretion-driven variability of the multimode oscillation spectrum Mkrtichian, D.E. Binaries: eclipsing Stars: oscillations |
| title_short |
The eclipsing binary star RZ Cas: Accretion-driven variability of the multimode oscillation spectrum |
| title_full |
The eclipsing binary star RZ Cas: Accretion-driven variability of the multimode oscillation spectrum |
| title_fullStr |
The eclipsing binary star RZ Cas: Accretion-driven variability of the multimode oscillation spectrum |
| title_full_unstemmed |
The eclipsing binary star RZ Cas: Accretion-driven variability of the multimode oscillation spectrum |
| title_sort |
The eclipsing binary star RZ Cas: Accretion-driven variability of the multimode oscillation spectrum |
| dc.creator.none.fl_str_mv |
Mkrtichian, D.E. Lehmann, H. Rodríguez Martínez, Eloy Olson, E. Kim, S.L. Kusakin, A.V. Lee, J.W. Youn, J.H. Kwon, S.G. López González, Maria J. Janiashvili, E. Tiwari, S.K. Joshi, S. Lampens, P. Van Cauteren, P. Glazunova, L. Gamarova, A. Grankin, K.N. Rovithis-Livaniou, E. Svoboda, P. Uhlar, R. Tsymbal, V. Kokumbaeva, R. Urushadze, T. Kuratov, K. Shin, H.C. Kang, Y.W. Soonthornthum, B. |
| author |
Mkrtichian, D.E. |
| author_facet |
Mkrtichian, D.E. Lehmann, H. Rodríguez Martínez, Eloy Olson, E. Kim, S.L. Kusakin, A.V. Lee, J.W. Youn, J.H. Kwon, S.G. López González, Maria J. Janiashvili, E. Tiwari, S.K. Joshi, S. Lampens, P. Van Cauteren, P. Glazunova, L. Gamarova, A. Grankin, K.N. Rovithis-Livaniou, E. Svoboda, P. Uhlar, R. Tsymbal, V. Kokumbaeva, R. Urushadze, T. Kuratov, K. Shin, H.C. Kang, Y.W. Soonthornthum, B. |
| author_role |
author |
| author2 |
Lehmann, H. Rodríguez Martínez, Eloy Olson, E. Kim, S.L. Kusakin, A.V. Lee, J.W. Youn, J.H. Kwon, S.G. López González, Maria J. Janiashvili, E. Tiwari, S.K. Joshi, S. Lampens, P. Van Cauteren, P. Glazunova, L. Gamarova, A. Grankin, K.N. Rovithis-Livaniou, E. Svoboda, P. Uhlar, R. Tsymbal, V. Kokumbaeva, R. Urushadze, T. Kuratov, K. Shin, H.C. Kang, Y.W. Soonthornthum, B. |
| author2_role |
author author author author author author author author author author author author author author author author author author author author author author author author author author author |
| dc.contributor.none.fl_str_mv |
Ministry of Science and Technology (Thailand) German Research Foundation Ministerio de Economía y Competitividad (España) European Commission Russian Foundation for Basic Research Ministry of Science and Technology (India) Department of Science and Technology (South Africa) Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72] |
| dc.subject.none.fl_str_mv |
Binaries: eclipsing Stars: oscillations |
| topic |
Binaries: eclipsing Stars: oscillations |
| description |
We analysed photometric time series of the active, semidetached Algol-type system RZ Cas obtained in 1999-2009, in order to search for seasonal and short-term variations in the oscillation spectrum of RZ Cas A. The orbital period shows ±1 s cyclic variations on time-scales of 6-9 years. We detected six low-degree p-mode oscillations with periods between 22.3 and 26.22 min and obtained safe mode identifications using the periodic spatial filter method. The amplitudes and frequencies of all modes vary. We tested and confirm the hypothesis that rapid variations in the pulsation spectrum of the mass-accreting component and rapid increases in the orbital period are driven by high mass transfer and accretion outbursts caused by the cyclic magnetic activity of the Roche lobe-filling donor star. Two rapid pulsation-amplitude decays observed in 2001 and 2009 can be explained by high-mass transfer events separated by the duration of the last 9-yr long magnetic cycle.We also tested and confirm the hypothesis of an acceleration of the outer envelope of the pulsating component. We discovered synchronous, modal m-dependent variations in the frequencies of three identified modes, in good agreement with results of our mode identification using the periodic spatial filter method. We suggest that m-dependent pulsation frequency variations are caused via the Doppler-effect by variations of the rotation speed of the outer envelope of the pulsating gainer. With this method, we obtained the first asteroseismic detection and accurate measurement of the accretion driven acceleration of the outer envelope of the massaccreting component of an Algol-type star.© 2017 The Author(s). |
| publishDate |
2018 |
| dc.date.none.fl_str_mv |
2018 2020 2020 2020 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article http://purl.org/coar/resource_type/c_6501 Publisher's version info:eu-repo/semantics/publishedVersion |
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article |
| status_str |
publishedVersion |
| dc.identifier.none.fl_str_mv |
http://hdl.handle.net/10261/207431 |
| url |
http://hdl.handle.net/10261/207431 |
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Inglés |
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Inglés |
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#PLACEHOLDER_PARENT_METADATA_VALUE# #PLACEHOLDER_PARENT_METADATA_VALUE# #PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/AYA2014-54348-C3-1-R info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/ESP2014-54362-P info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/ESP2015-65712-C5-5-R http://dx.doi.org/10.1093/mnras/stx2841 Sí |
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info:eu-repo/semantics/openAccess |
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openAccess |
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Oxford University Press |
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Oxford University Press |
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reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC instname:Consejo Superior de Investigaciones Científicas (CSIC) |
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Consejo Superior de Investigaciones Científicas (CSIC) |
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DIGITAL.CSIC. Repositorio Institucional del CSIC |
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DIGITAL.CSIC. Repositorio Institucional del CSIC |
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1869414878146461696 |
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The eclipsing binary star RZ Cas: Accretion-driven variability of the multimode oscillation spectrumMkrtichian, D.E.Lehmann, H.Rodríguez Martínez, EloyOlson, E.Kim, S.L.Kusakin, A.V.Lee, J.W.Youn, J.H.Kwon, S.G.López González, Maria J. Janiashvili, E.Tiwari, S.K.Joshi, S.Lampens, P.Van Cauteren, P.Glazunova, L.Gamarova, A.Grankin, K.N.Rovithis-Livaniou, E.Svoboda, P.Uhlar, R.Tsymbal, V.Kokumbaeva, R.Urushadze, T.Kuratov, K.Shin, H.C.Kang, Y.W.Soonthornthum, B.Binaries: eclipsingStars: oscillationsWe analysed photometric time series of the active, semidetached Algol-type system RZ Cas obtained in 1999-2009, in order to search for seasonal and short-term variations in the oscillation spectrum of RZ Cas A. The orbital period shows ±1 s cyclic variations on time-scales of 6-9 years. We detected six low-degree p-mode oscillations with periods between 22.3 and 26.22 min and obtained safe mode identifications using the periodic spatial filter method. The amplitudes and frequencies of all modes vary. We tested and confirm the hypothesis that rapid variations in the pulsation spectrum of the mass-accreting component and rapid increases in the orbital period are driven by high mass transfer and accretion outbursts caused by the cyclic magnetic activity of the Roche lobe-filling donor star. Two rapid pulsation-amplitude decays observed in 2001 and 2009 can be explained by high-mass transfer events separated by the duration of the last 9-yr long magnetic cycle.We also tested and confirm the hypothesis of an acceleration of the outer envelope of the pulsating component. We discovered synchronous, modal m-dependent variations in the frequencies of three identified modes, in good agreement with results of our mode identification using the periodic spatial filter method. We suggest that m-dependent pulsation frequency variations are caused via the Doppler-effect by variations of the rotation speed of the outer envelope of the pulsating gainer. With this method, we obtained the first asteroseismic detection and accurate measurement of the accretion driven acceleration of the outer envelope of the massaccreting component of an Algol-type star.© 2017 The Author(s).DEM acknowledges his work as part of the research activity supported by the National Astronomical Research Institute of Thailand (NARIT), Ministry of Science and Technology of Thailand. HL acknowledges support by the DFGgrant LE 1102/3-1. ER and MGLJ acknowledge support MINECO/Spain projects AYA2014-54348-C3-1-R, ESP2014-54362-P and ESP2015-65712-C5-5-R. VT acknowledges support from RFBR grant no. 15-52-12371. SJ acknowledge the grant received from Indo-South Africa Science and Technology Cooperation INT/SAFR/P-3(3)2009) and NRF grant UID69828 funded by Departments of Science and Technology of the Indian and South African Governments under which the photometric observations were carried out from ARIES. KA, RK acknowledge their work as a research activity in the framework of Project No. 0075/GF4 'Investigation of the Variability of Stars and the Processes of Substance Exchange With a Gas-Dust Disk' DEM thanks E. Soydugan for providing her 2002 observations of RZ Cas for re-analysis. MDE thanks amateur astronomer Kari Tikkanen (Oulu University) for providing us, when we were searching for evidences of orbital period jump, his visual observations, which safely showed the orbital period jump in RZ Cas in the years 2000-2001.Oxford University PressMinistry of Science and Technology (Thailand)German Research FoundationMinisterio de Economía y Competitividad (España)European CommissionRussian Foundation for Basic ResearchMinistry of Science and Technology (India)Department of Science and Technology (South Africa)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2020202020182020info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/207431reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/AYA2014-54348-C3-1-Rinfo:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/ESP2014-54362-Pinfo:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/ESP2015-65712-C5-5-Rhttp://dx.doi.org/10.1093/mnras/stx2841Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2074312026-05-22T06:33:51Z |
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15,81155 |