KFU. Card publication. The determination of white dwarf parameters in dwarf novae by optical spectral modeling

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FEDERAL UNIVERSITY

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THE DETERMINATION OF WHITE DWARF PARAMETERS IN DWARF NOVAE BY OPTICAL SPECTRAL MODELING

Form of presentation

Articles in international journals and collections

Year of publication

2021

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Authors, employees of KFU

Shimanskiy Vladislav Vladimirovich, author

Bibliographic description in the original language

Dudnik A.A, Mitrofanova A.A, Shimansky V.V, The determination of white dwarf parameters in dwarf novae by optical spectral modeling//Research in Astronomy and Astrophysics. - 2021. - Vol.21, Is.7. - Art. �158.

Annotation

This paper presents the results of a model analysis of optical spectra and determination of theree 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 ( and ) 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.

Keywords

techniques: spectroscopic, stars:variables: dwarf novae, stars: individual: TY Psc, stars: individual: FL Psc, stars: individual: V455 And

The name of the journal

RESEARCH IN ASTRONOMY AND ASTROPHYSICS

URL

https://www.scopus.com/inward/record.uri?eid=2-s2.0-85114997419&doi=10.1088%2f1674-4527%2f21%2f7%2f158&partnerID=40&md5=f80ff1cd6c4d183dccc924b6d9265ae8

Please use this ID to quote from or refer to the card

https://repository.kpfu.ru/eng/?p_id=257060&p_lang=2

Full metadata record

Field DC	Value	Language
dc.contributor.author	Shimanskiy Vladislav Vladimirovich	ru_RU
dc.date.accessioned	2021-01-01T00:00:00Z	ru_RU
dc.date.available	2021-01-01T00:00:00Z	ru_RU
dc.date.issued	2021	ru_RU
dc.identifier.citation	Dudnik A.A, Mitrofanova A.A, Shimansky V.V, The determination of white dwarf parameters in dwarf novae by optical spectral modeling//Research in Astronomy and Astrophysics. - 2021. - Vol.21, Is.7. - Art. �158.	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=257060&p_lang=2	ru_RU
dc.description.abstract	RESEARCH IN ASTRONOMY AND ASTROPHYSICS	ru_RU
dc.description.abstract	This paper presents the results of a model analysis of optical spectra and determination of theree 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 ( and ) 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.	ru_RU
dc.language.iso	ru	ru_RU
dc.subject	techniques: spectroscopic	ru_RU
dc.subject	stars:variables: dwarf novae	ru_RU
dc.subject	stars: individual: TY Psc	ru_RU
dc.subject	stars: individual: FL Psc	ru_RU
dc.subject	stars: individual: V455 And	ru_RU
dc.title	The determination of white dwarf parameters in dwarf novae by optical spectral modeling	ru_RU
dc.type	Articles in international journals and collections	ru_RU