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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/7282
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dc.contributor.authorAftab, Nafisa-
dc.contributor.authorPaul, Biswajit-
dc.contributor.authorKretschmar, Peter-
dc.date.accessioned2019-09-12T18:08:38Z-
dc.date.available2019-09-12T18:08:38Z-
dc.date.issued2019-08-05-
dc.identifier.citationThe Astrophysical Journal Supplement Series,2019, Vol, 243, p29en_US
dc.identifier.issn0067-0049-
dc.identifier.issn1538-4365 (Online)-
dc.identifier.urihttp://hdl.handle.net/2289/7282-
dc.descriptionOpen Accessen_US
dc.description.abstractThe study of X-ray reprocessing is one of the key diagnostic tools to probe the environment in X-ray binary systems. One difficult aspect of studying X-ray reprocessing is the presence of much brighter primary radiation from the compact star together with the reprocessed radiation. In contrast, for eclipsing systems, the X-rays we receive during eclipse are only those produced by the reprocessing of the emission from the compact star by the surrounding medium. We report results from a spectral study of the X-ray emission during eclipse and outside eclipse in nine high-mass X-ray binaries (HMXBs) with the XMM-Newton European Photon Imaging Camera (EPIC) pn to investigate different aspects of the stellar wind in these HMXBs. During eclipse the continuum component of the spectrum is reduced by a factor of ∼8─237, but the count rate for the 6.4 keV iron emission line or the complex of iron emission lines in HMXBs is reduced by a smaller factor, leading to large equivalent widths of the iron emission lines. This indicates a large size for the line emission region, comparable to or larger than the companion star in these HMXB systems. However, there are significant system to system differences. 4U 1538−522, despite having a large absorption column density, shows a soft emission component with comparable flux during the eclipse and out-of-eclipse phases. Emission from hydrogen-like iron has been observed in LMC X-4 for the first time, in the out-of-eclipse phase in one of the observations.. Overall, we find significant differences in the eclipse spectrum of different HMXBs and also in their eclipse spectra against out-of-eclipse spectra.en_US
dc.language.isoenen_US
dc.publisherThe American Astronomical Societyen_US
dc.relation.urihttps://ui.adsabs.harvard.edu/abs/2019ApJS..243...29A/abstracten_US
dc.relation.urihttps://arxiv.org/abs/1906.07739en_US
dc.relation.urihttps://doi.org/10.3847/1538-4365/ab2a77en_US
dc.rights2019 The American Astronomical Societyen_US
dc.subjectbinaries: eclipsingen_US
dc.subjectstars: neutronen_US
dc.subjectsupergiantsen_US
dc.titleX-Ray Reprocessing: Through the Eclipse Spectra of High-mass X-Ray Binaries with XMM-Newtonen_US
dc.typeArticleen_US
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