Электронный архив

Observations of Her X-1 in low states during SRG/eROSITA all-sky survey

Показать сокращенную информацию

dc.contributor.author Shakura N.I.
dc.contributor.author Kolesnikov D.A.
dc.contributor.author Medvedev P.S.
dc.contributor.author Sunyaev R.A.
dc.contributor.author Gilfanov M.R.
dc.contributor.author Postnov K.A.
dc.contributor.author Molkov S.V.
dc.date.accessioned 2022-02-09T20:30:32Z
dc.date.available 2022-02-09T20:30:32Z
dc.date.issued 2021
dc.identifier.issn 0004-6361
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/168634
dc.description.abstract eROSITA (extended ROentgen Survey with an Imaging Telescope Array) instrument onboard the Russian-German 'Spectrum-Roentgen-Gamma' (SRG) mission observed the Her X-1/HZ Her binary system in multiple scans over the source during the first and second SRG all-sky surveys. Both observations occurred during a low state of the X-ray source when the outer parts of the accretion disk blocked the neutron star from view. The orbital modulation of the X-ray flux was detected during the low states. We argue that the detected X-ray radiation results from scattering of the emission of the central source by three distinct regions: (a) an optically thin hot corona with temperature ~(2-4) × 10K above the irradiated hemisphere of the optical star; (b) an optically thin hot halo above the accretion disk; and (c) the optically thick cold atmosphere of the optical star. The latter region effectively scatters photons with energies above 5-6 keV.
dc.relation.ispartofseries Astronomy and Astrophysics
dc.subject Accretion, accretion disks
dc.subject Binaries: close
dc.subject Stars: neutron
dc.subject X-rays: binaries
dc.title Observations of Her X-1 in low states during SRG/eROSITA all-sky survey
dc.type Review
dc.relation.ispartofseries-volume 648
dc.collection Публикации сотрудников КФУ
dc.source.id SCOPUS00046361-2021-648-SID85104204839


Файлы в этом документе

Данный элемент включен в следующие коллекции

  • Публикации сотрудников КФУ Scopus [24551]
    Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.

Показать сокращенную информацию

Поиск в электронном архиве


Расширенный поиск

Просмотр

Моя учетная запись

Статистика