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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Detalles Bibliográficos
Autores principales: Qian, Sheng-Bang, Zhu, Li-Ying, Zhao, E.-G., Fernández Lajús, Eduardo Eusebio, Zhang, Jianhua, Shi, Guang, Han, Z.-T.
Formato: Articulo
Lenguaje:Inglés
Publicado: 2015
Materias:
Ciencias Astronómicas
Cataclysmic variables
Polars
Photometry
Individual: HU Aqr
DP Leo
MN Hya
V2301 Oph
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/126334
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-126334
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
Cataclysmic variables
Polars
Photometry
Individual: HU Aqr
DP Leo
MN Hya
V2301 Oph
spellingShingle Ciencias Astronómicas
Cataclysmic variables
Polars
Photometry
Individual: HU Aqr
DP Leo
MN Hya
V2301 Oph
Qian, Sheng-Bang
Zhu, Li-Ying
Zhao, E.-G.
Fernández Lajús, Eduardo Eusebio
Zhang, Jianhua
Shi, Guang
Han, Z.-T.
Evolution and outbursts of cataclysmic variables
topic_facet 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.
format Articulo
Articulo
author Qian, Sheng-Bang
Zhu, Li-Ying
Zhao, E.-G.
Fernández Lajús, Eduardo Eusebio
Zhang, Jianhua
Shi, Guang
Han, Z.-T.
author_facet Qian, Sheng-Bang
Zhu, Li-Ying
Zhao, E.-G.
Fernández Lajús, Eduardo Eusebio
Zhang, Jianhua
Shi, Guang
Han, Z.-T.
author_sort Qian, Sheng-Bang
title Evolution and outbursts of cataclysmic variables
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
publishDate 2015
url http://sedici.unlp.edu.ar/handle/10915/126334
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AT zhuliying evolutionandoutburstsofcataclysmicvariables
AT zhaoeg evolutionandoutburstsofcataclysmicvariables
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AT zhangjianhua evolutionandoutburstsofcataclysmicvariables
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