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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/8601
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dc.contributor.authorRoy, Kinjal-
dc.contributor.authorManikantan, Hemanth-
dc.contributor.authorPaul, Biswajit-
dc.date.accessioned2025-10-07T11:04:42Z-
dc.date.available2025-10-07T11:04:42Z-
dc.date.issued2025-10-01-
dc.identifier.citationThe Astrophysical Journal, 2025, Vol. 991, p162en_US
dc.identifier.urihttp://hdl.handle.net/2289/8601-
dc.descriptionOpen Accessen_US
dc.description.abstractCentaurus X–3 (Cen X–3) is a bright, high-mass X-ray binary pulsar. We present a pulse phase–resolved X-ray spectral analysis of data from an archival XMM-Newton observation of Cen X–3 taken during the high state of the source. The observation was entirely in the out-of-eclipse part of the binary orbit. We study the pulse phase variability of the three Kα fluorescent emission lines from near-neutral, helium-like, and hydrogen-like iron, along with the iron Kβ emission line. All four lines show clear modulation with the pulse phase of the neutron star (NS), and modulation is found to be higher for the lines from highly ionised iron compared to the neutral lines. Structures within the light travel distance corresponding to the pulse period of the NS are likely responsible for the pulse phase modulation of the emission lines. We have also investigated the orbital phase dependence of the pulse phase variability in the iron lines by dividing the data into four segments at different orbital phases of Cen X–3. The pulse phase modulation behavior of the four lines is quite identical at different orbital phases of Cen X–3, indicating the pulsed iron emission region is persistent in nature and probably phase aligned with respect to the observer. The accretion stream intercepting the line of sight can probably produce the observed phase dependence of the iron fluorescence emission lines.en_US
dc.language.isoenen_US
dc.publisherIOP Publishing Ltden_US
dc.relation.urihttps://arxiv.org/abs/2509.25036en_US
dc.relation.urihttps://ui.adsabs.harvard.edu/abs/2025ApJ...991..162R/abstracten_US
dc.relation.urihttps://inspirehep.net/literature/2974751en_US
dc.relation.urihttps://doi.org/10.3847/1538-4357/adf8e6en_US
dc.rights2025 The Author(s)en_US
dc.titleXMM-Newton View of Pulsating Iron Fluorescent Emission from Centaurus X-3en_US
dc.typeArticleen_US
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