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http://hdl.handle.net/2289/8218| Title: | X-ray reprocessing: Through the eclipse spectra of low mass X-ray binaries with XMM-Newton |
| Authors: | Aftab, Nafisa Paul, Biswajit |
| Issue Date: | Feb-2024 |
| Publisher: | Elsevier |
| Citation: | New Astronomy, 2024, Vol. 106, p102109 |
| Abstract: | Eclipsing X-ray binaries make an ideal condition to study reprocessed X-rays, as the X-rays detected during eclipse are purely reprocessed while the much brighter primary X-rays are blocked by the companion star. We carried out a comprehensive study of X-ray reprocessing with four eclipsing Low Mass X-ray Binary (LMXB) systems by comparing X-ray spectra during and outside eclipse with XMM-Newton EPIC pn observations. The 17 observations of MXB 1659298, AX J1745.62901, EXO 0748676 and XTE J1710281 give unique features of the systems. For example, X-ray reprocessing characteristics in AX J1745.62901 is found to be nearly same irrespective of the intensity state; there is an indication of different types of variable warp structures in the inner accretion disk in EXO 0748676, a high out-of-eclipse to eclipse flux ratio in XTE J1710281 in spite of a large size of the accretion disk perhaps indicates low scale height of the accretion disk. The eclipse spectra for some of the LMXB sources are reported for the first time. We have derived the fractional visible area of the accretion disk during maximum eclipse phase for various obscuration geometries. The out-of-eclipse to eclipse flux ratio in LMXBs observed to be smaller compared to that found in High Mass X-ray Binaries. This indicates greater reprocessing in LMXBs despite having less dense, less extended stellar wind from the companion. The X-ray reprocessing efficiencies observed in LMXBs indicate large dependencies of X-ray reprocessing on the scale height of the accretion disk, relative size of the disk compared to the companion and some other unknown factors. |
| Description: | Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations) |
| URI: | http://hdl.handle.net/2289/8218 |
| Alternative Location: | https://ui.adsabs.harvard.edu/abs/2024NewA..10602109A/abstract https://arxiv.org/abs/2308.03916 https://inspirehep.net/literature/2686402 https://doi.org/10.1016/j.newast.2023.102109 |
| Copyright: | 2023 Elsevier B.V. |
| Appears in Collections: | Research Papers (A&A) |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 2024_New Astronomy_Vol106_102109.pdf Restricted Access | Restricted Access | 1.7 MB | Adobe PDF | View/Open Request a copy |
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