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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 |