KFU. Card publication. SRGe J214919.3+673634-a Candidate for AM Her Variables Discovered by the eROSITA Telescope onboard the Spectrum-Roentgen-Gamma Orbital Observatory

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SRGE J214919.3+673634-A CANDIDATE FOR AM HER VARIABLES DISCOVERED BY THE EROSITA TELESCOPE ONBOARD THE SPECTRUM-ROENTGEN-GAMMA ORBITAL OBSERVATORY

Form of presentation

Articles in international journals and collections

Year of publication

2022

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Authors, employees of KFU

Bikmaev Ilfan Fyaritovich, author

Kolbin Aleksandr Ivanovich, author

Nikolaeva Evgeniya Aleksandrovna, author

Shimanskiy Vladislav Vladimirovich, author

Bibliographic description in the original language

Bikmaev I. F., Kolbin A. I., Shimansky V. V., SRGe J214919.3+673634-a Candidate for AM Her Variables Discovered by the eROSITA Telescope onboard the Spectrum-Roentgen-Gamma Orbital Observatory//ASTRONOMY LETTERS-A JOURNAL OF ASTRONOMY AND SPACE ASTROPHYSICS. - 2022. - Vol.48, Is.9. - P.530-541.

Annotation

The paper presents the results of the optical identification, classification, as well as analysis of photometric and spectral observations of the X-ray transient SRGe2149+6736 detected by the eROSITA telescope of the orbital observatory SRG in the summer of 2021 during the 4th sky survey. Photometric observations of the optical companion of SRGe2149+6736 were carried out on the 6m telescope BTA SAO RAS, 1.5m Russian-Turkish telescope RTT-150 and 2.5m telescope CMO of Moscow State University. Together with ZTF data they showed that the source is a cataclysmic variable with an orbital period of P = 85 ? 0.4 min and demonstrate a long-term variability in brightness from 23.5 mag (low state) to 20 mag (high state). The high-state light curves are consistent with a model of accreting magnetic white dwarf and suggest that SRGe2149+6736 belongs to AM Her type variables. The optical spectra obtained in the low state are consistent with a spectral energy distribution of a white dwarf with a temperature of ∼ 24000 K.

Keywords

Stars: novae, cataclysmic variables ? Individual: SRGe2149+6736 ? Methods: photometry, spectroscopy

The name of the journal

ASTRONOMY LETTERS-A JOURNAL OF ASTRONOMY AND SPACE ASTROPHYSICS

URL

https://link.springer.com/article/10.1134/S1063773722090018

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

https://repository.kpfu.ru/eng/?p_id=277974&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.contributor.author	Nikolaeva Evgeniya Aleksandrovna	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	Bikmaev I. F., Kolbin A. I., Shimansky V. V., SRGe J214919.3+673634-a Candidate for AM Her Variables Discovered by the eROSITA Telescope onboard the Spectrum-Roentgen-Gamma Orbital Observatory//ASTRONOMY LETTERS-A JOURNAL OF ASTRONOMY AND SPACE ASTROPHYSICS. - 2022. - Vol.48, Is.9. - P.530-541.	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=277974&p_lang=2	ru_RU
dc.description.abstract	ASTRONOMY LETTERS-A JOURNAL OF ASTRONOMY AND SPACE ASTROPHYSICS	ru_RU
dc.description.abstract	The paper presents the results of the optical identification, classification, as well as analysis of photometric and spectral observations of the X-ray transient SRGe2149+6736 detected by the eROSITA telescope of the orbital observatory SRG in the summer of 2021 during the 4th sky survey. Photometric observations of the optical companion of SRGe2149+6736 were carried out on the 6m telescope BTA SAO RAS, 1.5m Russian-Turkish telescope RTT-150 and 2.5m telescope CMO of Moscow State University. Together with ZTF data they showed that the source is a cataclysmic variable with an orbital period of P = 85 ? 0.4 min and demonstrate a long-term variability in brightness from 23.5 mag (low state) to 20 mag (high state). The high-state light curves are consistent with a model of accreting magnetic white dwarf and suggest that SRGe2149+6736 belongs to AM Her type variables. The optical spectra obtained in the low state are consistent with a spectral energy distribution of a white dwarf with a temperature of ∼ 24000 K.	ru_RU
dc.language.iso	ru	ru_RU
dc.subject	Stars: novae	ru_RU
dc.subject	cataclysmic variables ? Individual: SRGe2149+6736 ? Methods: photometry	ru_RU
dc.subject	spectroscopy	ru_RU
dc.title	SRGe J214919.3+673634-a Candidate for AM Her Variables Discovered by the eROSITA Telescope onboard the Spectrum-Roentgen-Gamma Orbital Observatory	ru_RU
dc.type	Articles in international journals and collections	ru_RU