KFU. Card publication. On the nature of the 35-day cycle in the X-ray binary Her X-1/HZ Her

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FEDERAL UNIVERSITY

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ON THE NATURE OF THE 35-DAY CYCLE IN THE X-RAY BINARY HER X-1/HZ HER

Form of presentation

Articles in international journals and collections

Year of publication

2019

Язык

английский

Authors, employees of KFU

Bikmaev Ilfan Fyaritovich, author

Irtuganov Eldar Nailevich, author

Bibliographic description in the original language

Shakura N, Kolesnikov D, Postnov K, On the nature of the 35-day cycle in the X-ray binary Her X-1/HZ Her//Proceedings of the International Astronomical Union. - 2019. - Vol., Is.. - P.281-287.

Annotation

The X-ray binary Her X-1 consists of an accreting neutron star and the optical companion HZ Her. The 35-day X-ray variability of this system is known since its discovery in 1972 by the UHURU satellite and is believed to be caused by forced precession of the warped accretion disk tilted to the orbital plane. We argue that the observed features of the optical variability of HZ Her can be explained by free precession of the neutron star with a period close to that of the forced disk precession. The model parameters include a) the intensity (power) of the stream of matter flowing out of the optical star; b) the X-ray luminosity of the neutron star; c) the optical flux of the accretion disk; d) the X-ray irradiation pattern on the donor star; e) the tilt of the inner and outer edge of the accretion disk. A possible synchronization mechanism based on the coupling between the neutron star free precession and the dynamical action of non-stationary gas streams is discussed shortly.

Keywords

массивные рентгеновские двойные системы, искривленные аккреционные диски, нейтронные звезды

The name of the journal

Proceedings of the International Astronomical Union

URL

https://www.scopus.com/inward/record.uri?eid=2-s2.0-85077538976&doi=10.1017%2fS1743921319002151&partnerID=40&md5=d900e6701faaa3bee27db06d1108dea1

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

https://repository.kpfu.ru/eng/?p_id=244727&p_lang=2

Full metadata record

Field DC	Value	Language
dc.contributor.author	Bikmaev Ilfan Fyaritovich	ru_RU
dc.contributor.author	Irtuganov Eldar Nailevich	ru_RU
dc.date.accessioned	2019-01-01T00:00:00Z	ru_RU
dc.date.available	2019-01-01T00:00:00Z	ru_RU
dc.date.issued	2019	ru_RU
dc.identifier.citation	Shakura N, Kolesnikov D, Postnov K, On the nature of the 35-day cycle in the X-ray binary Her X-1/HZ Her//Proceedings of the International Astronomical Union. - 2019. - Vol., Is.. - P.281-287.	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=244727&p_lang=2	ru_RU
dc.description.abstract	Proceedings of the International Astronomical Union	ru_RU
dc.description.abstract	The X-ray binary Her X-1 consists of an accreting neutron star and the optical companion HZ Her. The 35-day X-ray variability of this system is known since its discovery in 1972 by the UHURU satellite and is believed to be caused by forced precession of the warped accretion disk tilted to the orbital plane. We argue that the observed features of the optical variability of HZ Her can be explained by free precession of the neutron star with a period close to that of the forced disk precession. The model parameters include a) the intensity (power) of the stream of matter flowing out of the optical star; b) the X-ray luminosity of the neutron star; c) the optical flux of the accretion disk; d) the X-ray irradiation pattern on the donor star; e) the tilt of the inner and outer edge of the accretion disk. A possible synchronization mechanism based on the coupling between the neutron star free precession and the dynamical action of non-stationary gas streams is discussed shortly.	ru_RU
dc.language.iso	ru	ru_RU
dc.subject	массивные рентгеновские двойные системы	ru_RU
dc.subject	искривленные аккреционные диски	ru_RU
dc.subject	нейтронные звезды	ru_RU
dc.title	On the nature of the 35-day cycle in the X-ray binary Her X-1/HZ Her	ru_RU
dc.type	Articles in international journals and collections	ru_RU