Evidence of accretion triggered oscillations in the pre-main-sequence interacting binary AK Sco

Pre-main sequence (PMS) binaries are surrounded by circumbinary disks from which matter falls onto both components. The material dragged from the circumbinary disk flows onto each star through independent streams channelled by the variable gravitational field. The action of the bar-like potential is...

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Detalhes bibliográficos
Autores: Gómez De Castro, Ana Inés, López Santiago, Javier, Talavera, A.
Tipo de documento: artigo
Data de publicação:2013
País:España
Recursos:Universidad Complutense de Madrid (UCM)
Repositório:Docta Complutense
Idioma:inglês
OAI Identifier:oai:docta.ucm.es:20.500.14352/33326
Acesso em linha:https://hdl.handle.net/20.500.14352/33326
Access Level:Acceso aberto
Palavra-chave:52
Accretion
Accretion discs
Binaries: close
Binaries: spectroscopic
Circumstellar matter
Stars: pre-main-sequence
Stars: individual: AK Sco
Stars: variables: T Tauri
Herbig Ae/Be
Astronomía (Matemáticas)
21 Astronomía y Astrofísica
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oai_identifier_str oai:docta.ucm.es:20.500.14352/33326
network_acronym_str ES
network_name_str España
repository_id_str
spelling Evidence of accretion triggered oscillations in the pre-main-sequence interacting binary AK ScoGómez De Castro, Ana InésLópez Santiago, JavierTalavera, A.52AccretionAccretion discsBinaries: closeBinaries: spectroscopicCircumstellar matterStars: pre-main-sequenceStars: individual: AK ScoStars: variables: T TauriHerbig Ae/BeAstronomía (Matemáticas)21 Astronomía y AstrofísicaPre-main sequence (PMS) binaries are surrounded by circumbinary disks from which matter falls onto both components. The material dragged from the circumbinary disk flows onto each star through independent streams channelled by the variable gravitational field. The action of the bar-like potential is most prominent in high eccentricity systems made of two equal mass stars. AK Sco is a unique PMS system composed of two F5 stars in an orbit with e=0.47. Henceforth, it is an ideal laboratory to study matter infall in binaries and its role in orbit circularization. In this letter, we report the detection of a 1.3mHz ultra low frequency oscillation in the ultraviolet light curve at periastron passage. This oscillation last 7 ks being most likely fed by the gravitational energy released when the streams tails spiralling onto each star get in contact at periastron passage enhancing the accretion flow; this unveils a new mechanism for angular momentum loss during pre-main sequence evolution and a new type of interacting binary.WileyUniversidad Complutense de Madrid20132013-02-0120132013-02-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/33326reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/333262026-06-02T12:44:21Z
dc.title.none.fl_str_mv Evidence of accretion triggered oscillations in the pre-main-sequence interacting binary AK Sco
title Evidence of accretion triggered oscillations in the pre-main-sequence interacting binary AK Sco
spellingShingle Evidence of accretion triggered oscillations in the pre-main-sequence interacting binary AK Sco
Gómez De Castro, Ana Inés
52
Accretion
Accretion discs
Binaries: close
Binaries: spectroscopic
Circumstellar matter
Stars: pre-main-sequence
Stars: individual: AK Sco
Stars: variables: T Tauri
Herbig Ae/Be
Astronomía (Matemáticas)
21 Astronomía y Astrofísica
title_short Evidence of accretion triggered oscillations in the pre-main-sequence interacting binary AK Sco
title_full Evidence of accretion triggered oscillations in the pre-main-sequence interacting binary AK Sco
title_fullStr Evidence of accretion triggered oscillations in the pre-main-sequence interacting binary AK Sco
title_full_unstemmed Evidence of accretion triggered oscillations in the pre-main-sequence interacting binary AK Sco
title_sort Evidence of accretion triggered oscillations in the pre-main-sequence interacting binary AK Sco
dc.creator.none.fl_str_mv Gómez De Castro, Ana Inés
López Santiago, Javier
Talavera, A.
author Gómez De Castro, Ana Inés
author_facet Gómez De Castro, Ana Inés
López Santiago, Javier
Talavera, A.
author_role author
author2 López Santiago, Javier
Talavera, A.
author2_role author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 52
Accretion
Accretion discs
Binaries: close
Binaries: spectroscopic
Circumstellar matter
Stars: pre-main-sequence
Stars: individual: AK Sco
Stars: variables: T Tauri
Herbig Ae/Be
Astronomía (Matemáticas)
21 Astronomía y Astrofísica
topic 52
Accretion
Accretion discs
Binaries: close
Binaries: spectroscopic
Circumstellar matter
Stars: pre-main-sequence
Stars: individual: AK Sco
Stars: variables: T Tauri
Herbig Ae/Be
Astronomía (Matemáticas)
21 Astronomía y Astrofísica
description Pre-main sequence (PMS) binaries are surrounded by circumbinary disks from which matter falls onto both components. The material dragged from the circumbinary disk flows onto each star through independent streams channelled by the variable gravitational field. The action of the bar-like potential is most prominent in high eccentricity systems made of two equal mass stars. AK Sco is a unique PMS system composed of two F5 stars in an orbit with e=0.47. Henceforth, it is an ideal laboratory to study matter infall in binaries and its role in orbit circularization. In this letter, we report the detection of a 1.3mHz ultra low frequency oscillation in the ultraviolet light curve at periastron passage. This oscillation last 7 ks being most likely fed by the gravitational energy released when the streams tails spiralling onto each star get in contact at periastron passage enhancing the accretion flow; this unveils a new mechanism for angular momentum loss during pre-main sequence evolution and a new type of interacting binary.
publishDate 2013
dc.date.none.fl_str_mv 2013
2013-02-01
2013
2013-02-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/33326
url https://hdl.handle.net/20.500.14352/33326
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Wiley
publisher.none.fl_str_mv Wiley
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869414787037790208
score 15,228081

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