КФУ. Карточка публикации. Evolution of broad-band SED during outburst rise in NS X-ray Nova Aql X-1

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EVOLUTION OF BROAD-BAND SED DURING OUTBURST RISE IN NS X-RAY NOVA AQL X-1

Форма представления

Статьи в зарубежных журналах и сборниках

Год публикации

2018

Язык

английский

Авторы, сотрудники КФУ

Бикмаев Ильфан Фяритович, автор

Библиографическое описание на языке оригинала

Meshcheryakov Alexander V., Tsygankov Sergey S., Khamitov Irek M., Evolution of broad-band SED during outburst rise in NS X-ray Nova Aql X-1//MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. - 2018. - Vol.473, Is.3. - P.3987-4002.

Аннотация

he observed evolution of the broad-band spectral energy distribution (SED) in NS X-ray Nova Aql X-1 during the rise phase of a bright Fast-Rise-Exponential-Decay-type outburst in 2013 can be understood in the framework of thermal emission from non-stationary accretion disc with radial temperature distribution transforming from a single-temperature blackbody emitting ring into the multicolour irradiated accretion disc. SED evolution during the hard to soft X-ray state transition looks unusual, as it cannot be reproduced by the standard disc irradiation model with a single irradiation parameter for NUV, Optical and NIR spectral bands. NIR (NUV) band is correlated with soft (hard) X-ray flux changes during the state transition interval, respectively. In our interpretation, at the moment of X-ray state transition UV-emitting parts of the accretion disc are screened from direct X-ray illumination from the central source and are heated primarily by hard X-rays (E > 10 keV), scattered in the hot corona or wind possibly formed above the optically thick outer accretion flow; the outer edge of multicolour disc, which emits in Optical-NIR, can be heated primarily by direct X-ray illumination. We point out that future simultaneous multiwavelength observations of X-ray Nova systems during the fast X-ray state transition interval are of great importance, as it can serve as 'X-ray tomograph' to study physical conditions in outer regions of accretion flow. This can provide an effective tool to directly test the energy-dependent X-ray heating efficiency, vertical structure and accretion flow geometry in transient low-mass X-ray binaries.

Ключевые слова

тесные двойные системы, аккреционные диски, нейтронные звезды

Название журнала

Monthly Notices of the Royal Astronomical Society

URL

https://academic.oup.com/mnras/article-abstract/473/3/3987/4331644?redirectedFrom=PDF

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https://repository.kpfu.ru/?p_id=176945

Полная запись метаданных

Поле DC	Значение	Язык
dc.contributor.author	Бикмаев Ильфан Фяритович	ru_RU
dc.date.accessioned	2018-01-01T00:00:00Z	ru_RU
dc.date.available	2018-01-01T00:00:00Z	ru_RU
dc.date.issued	2018	ru_RU
dc.identifier.citation	Meshcheryakov Alexander V., Tsygankov Sergey S., Khamitov Irek M., Evolution of broad-band SED during outburst rise in NS X-ray Nova Aql X-1//MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. - 2018. - Vol.473, Is.3. - P.3987-4002.	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/?p_id=176945	ru_RU
dc.description.abstract	Monthly Notices of the Royal Astronomical Society	ru_RU
dc.description.abstract	he observed evolution of the broad-band spectral energy distribution (SED) in NS X-ray Nova Aql X-1 during the rise phase of a bright Fast-Rise-Exponential-Decay-type outburst in 2013 can be understood in the framework of thermal emission from non-stationary accretion disc with radial temperature distribution transforming from a single-temperature blackbody emitting ring into the multicolour irradiated accretion disc. SED evolution during the hard to soft X-ray state transition looks unusual, as it cannot be reproduced by the standard disc irradiation model with a single irradiation parameter for NUV, Optical and NIR spectral bands. NIR (NUV) band is correlated with soft (hard) X-ray flux changes during the state transition interval, respectively. In our interpretation, at the moment of X-ray state transition UV-emitting parts of the accretion disc are screened from direct X-ray illumination from the central source and are heated primarily by hard X-rays (E > 10 keV), scattered in the hot corona or wind possibly formed above the optically thick outer accretion flow; the outer edge of multicolour disc, which emits in Optical-NIR, can be heated primarily by direct X-ray illumination. We point out that future simultaneous multiwavelength observations of X-ray Nova systems during the fast X-ray state transition interval are of great importance, as it can serve as 'X-ray tomograph' to study physical conditions in outer regions of accretion flow. This can provide an effective tool to directly test the energy-dependent X-ray heating efficiency, vertical structure and accretion flow geometry in transient low-mass X-ray binaries.	ru_RU
dc.language.iso	ru	ru_RU
dc.subject	тесные двойные системы	ru_RU
dc.subject	аккреционные диски	ru_RU
dc.subject	нейтронные звезды	ru_RU
dc.title	Evolution of broad-band SED during outburst rise in NS X-ray Nova Aql X-1	ru_RU
dc.type	Статьи в зарубежных журналах и сборниках	ru_RU