Abstract Details
| Name: NAFISA AFTAB Affiliation: RAMAN RESEARCH INSTITUTE Conference ID: ASI2018_682 Title : A study of X-ray reprocessing in low mass X-ray binaries with XMM-Newton Authors and Co-Authors : Prof. Biswajit Paul Abstract Type : Poster Abstract Category : Stars,ISM and the Galaxy Abstract : In X-ray binaries, primary X-rays originate in regions close to the compact object. Study of reprocessed X-rays can give useful information about the environment of the compact star, i.e. about the characteristics of the accretion disc or wind of the companion. But the difficult aspect of studying reprocessed X-rays is that the reprocessed emission is detected along with the primary emission, which is much brighter. 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 primary X-rays are blocked by the companion star. We have studied 4 low mass X-ray binaries (LMXBs), namely EXO 0748-676, XTE J1710-281, RX J1745.6-2900 and MXB 1659-298 during eclipse and the out-of-eclipse phases with XMM-Newton. Comparison of the eclipse and out-of-eclipse spectra of these sources shows different binary environment in all the 4 LMXBs. For example warps in the accretion disk of EXO 0748-676, tilted or very small accretion disk in XTE J1710-281, a soft X-ray source at least further away from the outer accretion disk in RX J1745.6-2900 etc. have been found. In this first detailed X-ray reprocessing study with eclipsing LMXBs, we try to infer the accretion disk characteristics of these systems which is the main reprocessing agent in LMXB systems. |