Orbital Phase Spectroscopy of four High Mass X-ray Binary Pulsars to Study the Stellar Wind of the Companion

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dc.creatorNaik, Sachindra
dc.creatorMukherjee, Uddipan
dc.creatorPaul, Biswajit
dc.creatorChoi, C. S.
dc.date2008-12-24
dc.date.accessioned2026-07-07T13:06:13Z
dc.date.available2026-07-07T13:06:13Z
dc.descriptionOur work focuses on a comprehensive orbital phase dependent spectroscopy of the four High Mass X-ray Binary Pulsars (HMXBPs) 4U 1538-52, GX 301-2, OAO 1657-415 & Vela X-1. We hereby report the measurements of the variation of the absorption column density and iron-line flux along with other spectral parameters over the binary orbit for the above-mentioned HMXBPs in elliptical orbits, as observed with the Rossi X-ray Timing Explorer (RXTE) and the BeppoSAX satellites. A spherically symmetric wind profile was used as a model to compare the observed column density variations. Out of the four pulsars, only in 4U 1538-52, we find the model having a reasonable corroboration with the observations, whereas in the remaining three the stellar wind seems to be clumpy and a smooth symmetric stellar wind model appears to be quite inadequate in explaining the data. Moreover, in GX 301-2, neither the presence of a disk nor a gas stream from the companion was validated. Furthermore, the spectral results obtained in the case of OAO 1657-415 & Vela X-1 were more or less similar to that of GX 301-2.
dc.description9 pages, 4 figures, Accepted for publication in Advances in Space Research
dc.identifierhttps://arxiv.org/abs/0812.4519
dc.identifierhttp://arxiv.org/abs/0812.4519
dc.identifier2009, AdSpR, 43, 900-904
dc.identifierdoi:10.1016/j.asr.2008.12.011
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/227713
dc.subjectAstrophysics
dc.titleOrbital Phase Spectroscopy of four High Mass X-ray Binary Pulsars to Study the Stellar Wind of the Companion
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