Evolution and outbursts of cataclysmic variables

Mass transfer and accretion are very important to understand the evolution and observational properties of cataclysmic variables (CVs). Due to the lack of an accretion disk, eclipsing profiles of polars are the best source to study the character of mass transfer in CVs. By analyzing long-term photom...

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Autores: Qian, Sheng-Bang, Zhu, Li-Ying, Zhao, E.-G., Fernández Lajús, Eduardo Eusebio, Zhang, Jianhua, Shi, Guang, Han, Z.-T.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2015
País:Argentina
Institución:Universidad Nacional de La Plata
Repositorio:SEDICI (UNLP)
Idioma:inglés
OAI Identifier:oai:sedici.unlp.edu.ar:10915/126334
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/126334
Access Level:acceso abierto
Palabra clave:Ciencias Astronómicas
Cataclysmic variables
Polars
Photometry
Individual: HU Aqr
DP Leo
MN Hya
V2301 Oph
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spelling Evolution and outbursts of cataclysmic variablesQian, Sheng-BangZhu, Li-YingZhao, E.-G.Fernández Lajús, Eduardo EusebioZhang, JianhuaShi, GuangHan, Z.-T.Ciencias AstronómicasCataclysmic variablesPolarsPhotometryIndividual: HU AqrDP LeoMN HyaV2301 OphMass transfer and accretion are very important to understand the evolution and observational properties of cataclysmic variables (CVs). Due to the lack of an accretion disk, eclipsing profiles of polars are the best source to study the character of mass transfer in CVs. By analyzing long-term photometric variations in the eclipsing polar HU Aqr, the property of mass transfer and accretion are investigated. The correlation between the brightness state change and the variation of the ingress profile suggests that both the accretion hot spot and the accretion stream are produced instantaneously. The observations clearly show that it is the variation of mass transfer causing the brightness state changes that is a direct evidence of variable mass transfer in a CV. It is shown that it is the local dark-spot activity near the L1 point to cause the change of the mass transfer rather than the activity cycles of the cool secondary star. Our results suggest that the evolution of CVs is more complex than that predicted by the standard model and we should consider the effect of variable mass accretion in nova and dwarf nova outbursts.Facultad de Ciencias Astronómicas y Geofísicas2015-02-23info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf152-155http://sedici.unlp.edu.ar/handle/10915/126334enginfo:eu-repo/semantics/altIdentifier/issn/2336-5382info:eu-repo/semantics/altIdentifier/doi/10.14311/app.2015.02.0152info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/4.0/Creative Commons Attribution 4.0 International (CC BY 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2024-05-08T13:08:37Zoai:sedici.unlp.edu.ar:10915/126334Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292024-05-08 13:08:37.753SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Evolution and outbursts of cataclysmic variables
title Evolution and outbursts of cataclysmic variables
spellingShingle Evolution and outbursts of cataclysmic variables
Qian, Sheng-Bang
Ciencias Astronómicas
Cataclysmic variables
Polars
Photometry
Individual: HU Aqr
DP Leo
MN Hya
V2301 Oph
title_short Evolution and outbursts of cataclysmic variables
title_full Evolution and outbursts of cataclysmic variables
title_fullStr Evolution and outbursts of cataclysmic variables
title_full_unstemmed Evolution and outbursts of cataclysmic variables
title_sort Evolution and outbursts of cataclysmic variables
dc.creator.none.fl_str_mv Qian, Sheng-Bang
Zhu, Li-Ying
Zhao, E.-G.
Fernández Lajús, Eduardo Eusebio
Zhang, Jianhua
Shi, Guang
Han, Z.-T.
author Qian, Sheng-Bang
author_facet Qian, Sheng-Bang
Zhu, Li-Ying
Zhao, E.-G.
Fernández Lajús, Eduardo Eusebio
Zhang, Jianhua
Shi, Guang
Han, Z.-T.
author_role author
author2 Zhu, Li-Ying
Zhao, E.-G.
Fernández Lajús, Eduardo Eusebio
Zhang, Jianhua
Shi, Guang
Han, Z.-T.
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Ciencias Astronómicas
Cataclysmic variables
Polars
Photometry
Individual: HU Aqr
DP Leo
MN Hya
V2301 Oph
topic Ciencias Astronómicas
Cataclysmic variables
Polars
Photometry
Individual: HU Aqr
DP Leo
MN Hya
V2301 Oph
description Mass transfer and accretion are very important to understand the evolution and observational properties of cataclysmic variables (CVs). Due to the lack of an accretion disk, eclipsing profiles of polars are the best source to study the character of mass transfer in CVs. By analyzing long-term photometric variations in the eclipsing polar HU Aqr, the property of mass transfer and accretion are investigated. The correlation between the brightness state change and the variation of the ingress profile suggests that both the accretion hot spot and the accretion stream are produced instantaneously. The observations clearly show that it is the variation of mass transfer causing the brightness state changes that is a direct evidence of variable mass transfer in a CV. It is shown that it is the local dark-spot activity near the L1 point to cause the change of the mass transfer rather than the activity cycles of the cool secondary star. Our results suggest that the evolution of CVs is more complex than that predicted by the standard model and we should consider the effect of variable mass accretion in nova and dwarf nova outbursts.
publishDate 2015
dc.date.none.fl_str_mv 2015-02-23
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/126334
url http://sedici.unlp.edu.ar/handle/10915/126334
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/2336-5382
info:eu-repo/semantics/altIdentifier/doi/10.14311/app.2015.02.0152
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/4.0/
Creative Commons Attribution 4.0 International (CC BY 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by/4.0/
Creative Commons Attribution 4.0 International (CC BY 4.0)
dc.format.none.fl_str_mv application/pdf
152-155
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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