Dynamics of wind and the dusty environments in the accreting T Tauri stars RY Tauri and SU Aurigae

Classical T Tauri stars with ages of less than 10 Myr possess accretion discs. Magnetohydro-dynamic processes at the boundary between the disc and the stellar magnetosphere control the accretion and ejections gas flows. We carried out a long series of simultaneous spectroscopic and photometric obser...

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Autores: Petrov, P.P., Grankin, K.N., Gameiro, J.F., Artemenko, S.A., Babina, E.V., De Albuquerque, R.M.G., Djupvik, A.A., Gahm, G.F., Shenavrin, V.I., Irsmambetova, T.R., Fernández, Matilde, Mkrtichian, D.E., Gorda, S.Y.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2019
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/189369
Acceso en línea:http://hdl.handle.net/10261/189369
Access Level:acceso abierto
Palabra clave:Stars: Winds
Stars: Variables: T Tauri
Stars: Individual: SU Aur
Herbig Ae/Be
Line: Profiles
Outflows
Stars: Individual: RY Tau
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spelling Dynamics of wind and the dusty environments in the accreting T Tauri stars RY Tauri and SU AurigaePetrov, P.P.Grankin, K.N.Gameiro, J.F.Artemenko, S.A.Babina, E.V.De Albuquerque, R.M.G.Djupvik, A.A.Gahm, G.F.Shenavrin, V.I.Irsmambetova, T.R.Fernández, MatildeMkrtichian, D.E.Gorda, S.Y.Stars: WindsStars: Variables: T TauriStars: Individual: SU AurHerbig Ae/BeLine: ProfilesOutflowsStars: Individual: RY TauClassical T Tauri stars with ages of less than 10 Myr possess accretion discs. Magnetohydro-dynamic processes at the boundary between the disc and the stellar magnetosphere control the accretion and ejections gas flows. We carried out a long series of simultaneous spectroscopic and photometric observations of the classical T Tauri stars, RY Tauri and SU Aurigae, with the aim to quantify the accretion and outflow dynamics at time-scales from days to years. It is shown that dust in the disc wind is the main source of photometric variability of these stars. In RY Tau, we observed a new effect: during events of enhanced outflow, the circumstellar extinction becomes lower. The characteristic time of changes in outflow velocity and stellar brightness indicates that the obscuring dust is near the star. The outflow activity in both stars is changing on a time-scale of years. Periods of quiescence in the variability of the Hα profile were observed during the 2015-2016 period in RY Tau and during the 2016-2017 period in SU Aur. We interpret these findings in the framework of the magnetospheric accretion model, and we discuss how the global stellar magnetic field can influence the long-term variations of the outflow activity.© 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical SocietyThis research was supported by the RFBR grant 16-02-00140. It was based partly on observations made with the Nordic Optical Telescope, operated by the Nordic Optical Telescope Scientific Association at the Observatorio del Roque de los Muchachos, La Palma, Spain, of the Instituto de Astrofisica de Canarias, using ALFOSC, which is provided by the Instituto de Astrofisica de Andalucia (IAA) under a joint agreement with the University of Copenhagen and NOTSA. We acknowledge support from a Visitors Programme at the Department of Astronomy at Stockholm University. JFG and RMGA were supported by Fundacao para a Ciencia e a Tecnologia (FCT) through national funds (UID/FIS/04434/2013) and by FEDER through COMPETE2020 (POCI-01-0145-FEDER-007672). RMGA is supported by the fellowship PD/BD/113745/2015, under the FCT PD Program PhD::SPACE, funded by FCT (Portugal) and POPH/FSE (EC) and by CRUP through a cooperation programme (PAULIF: TC-16/17). 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. SYuG was supported in part by the Ministry of Education and Science of Russia (the basic part of the Stateassignment, RK no. AAAA-A17-117030310283-7) and by the Act no. 211 of the Government of the Russian Federation, agreement No 02.A03.21.0006.Peer ReviewedOxford University PressFundação para a Ciência e a Tecnologia (Portugal)European CommissionNational Astronomical Research Institute of ThailandMinistry of Education and Science of the Russian FederationRussian Foundation for Basic ResearchConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2019201920192019info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/189369reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)InglésSíinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1893692026-05-22T06:33:51Z
dc.title.none.fl_str_mv Dynamics of wind and the dusty environments in the accreting T Tauri stars RY Tauri and SU Aurigae
title Dynamics of wind and the dusty environments in the accreting T Tauri stars RY Tauri and SU Aurigae
spellingShingle Dynamics of wind and the dusty environments in the accreting T Tauri stars RY Tauri and SU Aurigae
Petrov, P.P.
Stars: Winds
Stars: Variables: T Tauri
Stars: Individual: SU Aur
Herbig Ae/Be
Line: Profiles
Outflows
Stars: Individual: RY Tau
title_short Dynamics of wind and the dusty environments in the accreting T Tauri stars RY Tauri and SU Aurigae
title_full Dynamics of wind and the dusty environments in the accreting T Tauri stars RY Tauri and SU Aurigae
title_fullStr Dynamics of wind and the dusty environments in the accreting T Tauri stars RY Tauri and SU Aurigae
title_full_unstemmed Dynamics of wind and the dusty environments in the accreting T Tauri stars RY Tauri and SU Aurigae
title_sort Dynamics of wind and the dusty environments in the accreting T Tauri stars RY Tauri and SU Aurigae
dc.creator.none.fl_str_mv Petrov, P.P.
Grankin, K.N.
Gameiro, J.F.
Artemenko, S.A.
Babina, E.V.
De Albuquerque, R.M.G.
Djupvik, A.A.
Gahm, G.F.
Shenavrin, V.I.
Irsmambetova, T.R.
Fernández, Matilde
Mkrtichian, D.E.
Gorda, S.Y.
author Petrov, P.P.
author_facet Petrov, P.P.
Grankin, K.N.
Gameiro, J.F.
Artemenko, S.A.
Babina, E.V.
De Albuquerque, R.M.G.
Djupvik, A.A.
Gahm, G.F.
Shenavrin, V.I.
Irsmambetova, T.R.
Fernández, Matilde
Mkrtichian, D.E.
Gorda, S.Y.
author_role author
author2 Grankin, K.N.
Gameiro, J.F.
Artemenko, S.A.
Babina, E.V.
De Albuquerque, R.M.G.
Djupvik, A.A.
Gahm, G.F.
Shenavrin, V.I.
Irsmambetova, T.R.
Fernández, Matilde
Mkrtichian, D.E.
Gorda, S.Y.
author2_role author
author
author
author
author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Fundação para a Ciência e a Tecnologia (Portugal)
European Commission
National Astronomical Research Institute of Thailand
Ministry of Education and Science of the Russian Federation
Russian Foundation for Basic Research
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Stars: Winds
Stars: Variables: T Tauri
Stars: Individual: SU Aur
Herbig Ae/Be
Line: Profiles
Outflows
Stars: Individual: RY Tau
topic Stars: Winds
Stars: Variables: T Tauri
Stars: Individual: SU Aur
Herbig Ae/Be
Line: Profiles
Outflows
Stars: Individual: RY Tau
description Classical T Tauri stars with ages of less than 10 Myr possess accretion discs. Magnetohydro-dynamic processes at the boundary between the disc and the stellar magnetosphere control the accretion and ejections gas flows. We carried out a long series of simultaneous spectroscopic and photometric observations of the classical T Tauri stars, RY Tauri and SU Aurigae, with the aim to quantify the accretion and outflow dynamics at time-scales from days to years. It is shown that dust in the disc wind is the main source of photometric variability of these stars. In RY Tau, we observed a new effect: during events of enhanced outflow, the circumstellar extinction becomes lower. The characteristic time of changes in outflow velocity and stellar brightness indicates that the obscuring dust is near the star. The outflow activity in both stars is changing on a time-scale of years. Periods of quiescence in the variability of the Hα profile were observed during the 2015-2016 period in RY Tau and during the 2016-2017 period in SU Aur. We interpret these findings in the framework of the magnetospheric accretion model, and we discuss how the global stellar magnetic field can influence the long-term variations of the outflow activity.© 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society
publishDate 2019
dc.date.none.fl_str_mv 2019
2019
2019
2019
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
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/189369
url http://hdl.handle.net/10261/189369
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Oxford University Press
publisher.none.fl_str_mv Oxford University Press
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,812429

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