KFU. Card publication. Definition and analysis of the fundamental parameters of a close binary system konkoly j064029.1+385652.2

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DEFINITION AND ANALYSIS OF THE FUNDAMENTAL PARAMETERS OF A CLOSE BINARY SYSTEM KONKOLY J064029.1+385652.2

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

Nurtdinova D.N, Shimansky V.V, Borisov N.V, Definition and analysis of the fundamental parameters of a close binary system konkoly j064029.1+385652.2//Astronomical and Astrophysical Transactions. - 2021. - Vol.32, Is.2. - P.123-130.

Annotation

In this work, we studied spectroscopic and photometric observations of the close binary system Konkoly J064029.1 + 385652.2, which is a candidate for young precataclysmic variables with an sdO subdwarf. Observations were obtained in 2017{19 on the Large Azimuth Telescope SAO and the Russian{Turkish RTT-150 telescope. The temperature Teff = 46800 +- 1600 K and surface gravity log g = 6:06 +- 0:11 dex of the primary are determined from modeling optical spectra of KJ 064029 in an era with no reection effects. These parameters of the star, together with the low atmospheric content of helium He=H = 0:007 +- 0:0007 and other elements, make it more likely to belong to the class of sdO-subdwarfs. The orbital inclination angle i = 86:5 +- 0:2 and the radii of the main (R1 = 0:104 +- 0:008 R) and secondary (R2 = 0:212 +- 0:009 R) were obtained by modeling the light curves in bands V and R. An analysis of the obtained parameters reveals a discrepancy between the dynamic mass of the main primary M1 = 0:567 M and its estimate based on the evolutionary tracks of hot subdwarfs. This fact leads to the conclusion about the need to clarify the masses of KJ 064029 and the evolutionary status of the primary.

Keywords

Techniques: photometric, stars: spectroscopic, stars: variables: precataclysmic binaries, stars: individual: Konkoly J064029.1+385652.2

The name of the journal

Astronomical and Astrophysical Transactions

URL

https://www.scopus.com/inward/record.uri?eid=2-s2.0-85117735955&partnerID=40&md5=94a89a11f17978cf6a741e65e537925e

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

https://repository.kpfu.ru/eng/?p_id=259989&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	Nurtdinova D.N, Shimansky V.V, Borisov N.V, Definition and analysis of the fundamental parameters of a close binary system konkoly j064029.1+385652.2//Astronomical and Astrophysical Transactions. - 2021. - Vol.32, Is.2. - P.123-130.	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=259989&p_lang=2	ru_RU
dc.description.abstract	Astronomical and Astrophysical Transactions	ru_RU
dc.description.abstract	In this work, we studied spectroscopic and photometric observations of the close binary system Konkoly J064029.1 + 385652.2, which is a candidate for young precataclysmic variables with an sdO subdwarf. Observations were obtained in 2017{19 on the Large Azimuth Telescope SAO and the Russian{Turkish RTT-150 telescope. The temperature Teff = 46800 +- 1600 K and surface gravity log g = 6:06 +- 0:11 dex of the primary are determined from modeling optical spectra of KJ 064029 in an era with no reection effects. These parameters of the star, together with the low atmospheric content of helium He=H = 0:007 +- 0:0007 and other elements, make it more likely to belong to the class of sdO-subdwarfs. The orbital inclination angle i = 86:5 +- 0:2 and the radii of the main (R1 = 0:104 +- 0:008 R) and secondary (R2 = 0:212 +- 0:009 R) were obtained by modeling the light curves in bands V and R. An analysis of the obtained parameters reveals a discrepancy between the dynamic mass of the main primary M1 = 0:567 M and its estimate based on the evolutionary tracks of hot subdwarfs. This fact leads to the conclusion about the need to clarify the masses of KJ 064029 and the evolutionary status of the primary.	ru_RU
dc.language.iso	ru	ru_RU
dc.subject	Techniques: photometric	ru_RU
dc.subject	stars: spectroscopic	ru_RU
dc.subject	stars: variables: precataclysmic binaries	ru_RU
dc.subject	stars: individual: Konkoly J064029.1+385652.2	ru_RU
dc.title	Definition and analysis of the fundamental parameters of a close binary system konkoly j064029.1+385652.2	ru_RU
dc.type	Articles in international journals and collections	ru_RU