KFU. Card publication. Optical Study of the Polar BM CrB in a Low State

KAZAN
FEDERAL UNIVERSITY

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OPTICAL STUDY OF THE POLAR BM CRB IN A LOW STATE

Form of presentation

Articles in international journals and collections

Year of publication

2023

Язык

английский

Authors, employees of KFU

Bikmaev Ilfan Fyaritovich, author

Kolbin Aleksandr Ivanovich, author

Bibliographic description in the original language

Kolbin A. I., Borisov NV, Burenkov AN, Optical Study of the Polar BM CrB in a Low State//ASTRONOMY LETTERS-A JOURNAL OF ASTRONOMY AND SPACE ASTROPHYSICS. - 2023. - Vol.49, Is.3. - P.129-140.

Annotation

We have performed spectroscopic and photometric studies of the poorly explored polar BM CrB. Based on ZTF survey data, we have revealed three brightness states of the polar and evidence of the transition from one-pole to two-pole accretion as the average brightness of the system increases. We show that there are a change in the longitude of the main accretion spot (by ≈17∘ ) and an increase in its extent (by ≈10∘ ) when passing from the low state to the high one. Zeeman H α absorptions formed in a magnetic field of strength B=15.5?1 MG are present in the spectra. The cool halo extending from the accretion spot to ≈1/4 of the white dwarf radius can be the source of these absorptions. Our modeling of the behavior of the H α emission line shows that the main source of the emission is the segment of the accretion stream near the Lagrange point L1

Keywords

novae; cataclysmic variables; BM CrB; photometry; spectroscopy

The name of the journal

ASTRONOMY LETTERS-A JOURNAL OF ASTRONOMY AND SPACE ASTROPHYSICS

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

https://repository.kpfu.ru/eng/?p_id=286462&p_lang=2

Full metadata record

Field DC	Value	Language
dc.contributor.author	Bikmaev Ilfan Fyaritovich	ru_RU
dc.contributor.author	Kolbin Aleksandr Ivanovich	ru_RU
dc.date.accessioned	2023-01-01T00:00:00Z	ru_RU
dc.date.available	2023-01-01T00:00:00Z	ru_RU
dc.date.issued	2023	ru_RU
dc.identifier.citation	Kolbin A. I., Borisov NV, Burenkov AN, Optical Study of the Polar BM CrB in a Low State//ASTRONOMY LETTERS-A JOURNAL OF ASTRONOMY AND SPACE ASTROPHYSICS. - 2023. - Vol.49, Is.3. - P.129-140.	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=286462&p_lang=2	ru_RU
dc.description.abstract	ASTRONOMY LETTERS-A JOURNAL OF ASTRONOMY AND SPACE ASTROPHYSICS	ru_RU
dc.description.abstract	We have performed spectroscopic and photometric studies of the poorly explored polar BM CrB. Based on ZTF survey data, we have revealed three brightness states of the polar and evidence of the transition from one-pole to two-pole accretion as the average brightness of the system increases. We show that there are a change in the longitude of the main accretion spot (by ≈17∘ ) and an increase in its extent (by ≈10∘ ) when passing from the low state to the high one. Zeeman H α absorptions formed in a magnetic field of strength B=15.5?1 MG are present in the spectra. The cool halo extending from the accretion spot to ≈1/4 of the white dwarf radius can be the source of these absorptions. Our modeling of the behavior of the H α emission line shows that the main source of the emission is the segment of the accretion stream near the Lagrange point L1	ru_RU
dc.language.iso	ru	ru_RU
dc.subject		ru_RU
dc.title	Optical Study of the Polar BM CrB in a Low State	ru_RU
dc.type	Articles in international journals and collections	ru_RU