KFU. Card publication. On accretion in the eclipsing polar BS Tri

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FEDERAL UNIVERSITY

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ON ACCRETION IN THE ECLIPSING POLAR BS TRI

Form of presentation

Articles in international journals and collections

Year of publication

2022

Язык

английский

Authors, employees of KFU

Kolbin Aleksandr Ivanovich, author

Shimanskiy Vladislav Vladimirovich, author

Bibliographic description in the original language

Kolbin AI, Borisov NV, Serebriakova NA, On accretion in the eclipsing polar BS Tri//MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. - 2022. - Vol.511, Is.1. - P.20-30.

Annotation

We analyse spectroscopic and photometric observations of the eclipsing polar BS Tri. The polar's light-curve-shape variations can be interpreted by changing contributions of the accretion stream to the integral radiation of the system. Based on the radial- v elocity curv es of the irradiated part of the secondary, we refine the masses of the system components, M 1 = 0.60 ?0.04 M and M 2 ≈0.12 M , and the orbital inclination, i = 85 ?0.5 ◦. The polar's spectra rev eal c yclotron harmonics forming in an accretion spot with a magnetic field strength of B = 22.7 ?0.4 MG and an average temperature of T ∼10 keV. In addition to the cyclotron harmonics, the BS Tri spectra contain Zeeman components of H αline, which are probably formed in the cool halo near the accretion spot. The orientation of the magnetic dipole and the coordinates of the accretion spot are estimated by modelling the light curves of the polar. We show that for a satisfactory description of the BS Tri light curves we have to take into account the variability of the spot's optical depth along the line of sight. Doppler maps of BS Tri show a part of the accretion stream with a trajectory close to ballistic near the Lagrange point L 1 , and another part of the stream moving along the magnetic field lines. The estimate of the stagnation region position found from the Doppler tomograms is consistent with the photometric estimates of the accretion spot position.

Keywords

binaries: eclipsing, stars: magnetic field, stars: novae, cataclysmic variables

The name of the journal

Monthly Notices of the Royal Astronomical Society

URL

https://doi.org/10.1093/mnras/stab3676

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

https://repository.kpfu.ru/eng/?p_id=265964&p_lang=2

Full metadata record

Field DC	Value	Language
dc.contributor.author	Kolbin Aleksandr Ivanovich	ru_RU
dc.contributor.author	Shimanskiy Vladislav Vladimirovich	ru_RU
dc.date.accessioned	2022-01-01T00:00:00Z	ru_RU
dc.date.available	2022-01-01T00:00:00Z	ru_RU
dc.date.issued	2022	ru_RU
dc.identifier.citation	Kolbin AI, Borisov NV, Serebriakova NA, On accretion in the eclipsing polar BS Tri//MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. - 2022. - Vol.511, Is.1. - P.20-30.	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=265964&p_lang=2	ru_RU
dc.description.abstract	Monthly Notices of the Royal Astronomical Society	ru_RU
dc.description.abstract	We analyse spectroscopic and photometric observations of the eclipsing polar BS Tri. The polar's light-curve-shape variations can be interpreted by changing contributions of the accretion stream to the integral radiation of the system. Based on the radial- v elocity curv es of the irradiated part of the secondary, we refine the masses of the system components, M 1 = 0.60 ?0.04 M and M 2 ≈0.12 M , and the orbital inclination, i = 85 ?0.5 ◦. The polar's spectra rev eal c yclotron harmonics forming in an accretion spot with a magnetic field strength of B = 22.7 ?0.4 MG and an average temperature of T ∼10 keV. In addition to the cyclotron harmonics, the BS Tri spectra contain Zeeman components of H αline, which are probably formed in the cool halo near the accretion spot. The orientation of the magnetic dipole and the coordinates of the accretion spot are estimated by modelling the light curves of the polar. We show that for a satisfactory description of the BS Tri light curves we have to take into account the variability of the spot's optical depth along the line of sight. Doppler maps of BS Tri show a part of the accretion stream with a trajectory close to ballistic near the Lagrange point L 1 , and another part of the stream moving along the magnetic field lines. The estimate of the stagnation region position found from the Doppler tomograms is consistent with the photometric estimates of the accretion spot position.	ru_RU
dc.language.iso	ru	ru_RU
dc.subject	binaries: eclipsing	ru_RU
dc.subject	stars: magnetic field	ru_RU
dc.subject	stars: novae	ru_RU
dc.subject	cataclysmic variables	ru_RU
dc.title	On accretion in the eclipsing polar BS Tri	ru_RU
dc.type	Articles in international journals and collections	ru_RU