Abstract Details
| Name: Bharti Arora Affiliation: Aryabhatta Research Institute of Observational Sciences, Nainital Conference ID: ASI2017_1093 Title : X-ray observations of a colliding wind binary WR-25. Authors and Co-Authors : Jeewan C.Pandey Aryabhatta Research Institute of Observational Sciences, Nainital. Abstract Type : Oral Abstract Category : Stars,ISM and the Galaxy Abstract : Using the data obtained from Chandra, Suzaku, XMM-Newton, and Swift spanning over ~13 years, we present an analysis of a WN+O Wolf-Rayet binary, WR 25. The X-ray light curves folded over a period of ~208 d in 0.3-10.0 keV energy band showed phase-locked variability where the count rates are found to be maximum near the periastron passage. The X-ray spectra of WR 25 are explained by a two-temperature plasma model with temperatures of 0.644±0.007 and 2.96±0.07 keV and are consistent with previous study. The orbital phase dependent local hydrogen column density is found to be maximum after the periastron passage, when the WN star is in front of the O star. The hard (2.0-10.0 keV) X-ray luminosity is linearly dependent on the inverse of binary separation which confirms that WR 25 is a colliding wind binary. |