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The determination of white dwarf parameters in dwarf novae by optical spectral modeling

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dc.contributor.author Dudnik A.A.
dc.contributor.author Mitrofanova A.A.
dc.contributor.author Shimansky V.V.
dc.contributor.author Borisov N.V.
dc.contributor.author Sakhibullin N.A.
dc.date.accessioned 2022-02-09T20:38:42Z
dc.date.available 2022-02-09T20:38:42Z
dc.date.issued 2021
dc.identifier.issn 1674-4527
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/169534
dc.description.abstract This paper presents the results of a model analysis of optical spectra and determination of the parameters of three individual SU UMa and WZ Sge type dwarf novae. The moderate resolution spectra of TY Psc, FL Psc and V455 And were obtained at the 6-m BTA of the SAO RAS in the low state of these systems with the determination of white dwarf radiation. The theoretical spectra were calculated using the grid models of hydrogen dwarf atmospheres of white dwarfs by varying the parameters (Teff and log g) to reach the best agreement with the observed ones. We highlight different effects of the parameters on the shape and intensity of the HI lines. Therefore, it is possible to unambiguously determine Teff and log g from the analysis of observations. The fundamental parameters of white dwarfs (M and R) were found by comparing the parameters of atmospheres with theoretical models of the internal structure. The obtained parameters of the primaries of TY Psc, FL Psc and V455 And are consistent with the average values for SU UMa and WZ Sge systems. As a result, we demonstrate the efficiency of the method for determining the parameters of such systems based on the analysis of a limited set of observed optical spectra.
dc.relation.ispartofseries Research in Astronomy and Astrophysics
dc.subject Stars: individual: FL Psc
dc.subject Stars: individual: TY Psc
dc.subject Stars: individual: V455 And
dc.subject Stars: variables: dwarf novae
dc.subject Techniques: spectroscopic
dc.title The determination of white dwarf parameters in dwarf novae by optical spectral modeling
dc.type Article
dc.relation.ispartofseries-issue 7
dc.relation.ispartofseries-volume 21
dc.collection Публикации сотрудников КФУ
dc.source.id SCOPUS16744527-2021-21-7-SID85114997419


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  • Публикации сотрудников КФУ Scopus [24551]
    Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.

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