Effects of satellite lines in fittings of He-like triplets of X-ray Spectra. Issue Volume 15:Issue S350(2019) (April 2019)

• Record Type: Journal Article
• Authors: Zhang, Lan; Xue, Xiangxiang; Yuan, Dawei; Wei, Huigang; Wang, Feilu; Zhao, Gang
• Editors: Salama, Farid; Linnartz, Harold
• Is Part Of: Proceedings of the International Astronomical Union. Volume 15:Issue S350(2019)
• Page Start: 249
• Page End: 252
• Publication Date: 2019-04
• Subjects: methods: data analysis, -- X-rays: binaries, -- line: identification; Astronomy -- Congresses; Astronomy -- Periodicals; 520
• DOI: 10.1017/S174392131900807X
• Languages: English
• ISSNs: 1743-9213

Abstract

Abstract: We estimate the wind speeds with a Bayesian inference and a Markov Chain Monte Carlo (MCMC) tool for the high resolution X-ray spectra of Vela X-1, to understand the effect of satellite lines on spectral analysis. After modelling continua and He-like triplets of the spectra with a parameterized two-component power-law model and a mullti-Gaussian model, respectively, we estimate the contamination from satellite lines, and improve the self-consistency of wind speeds derived from the He-like triplet lines of different elements. Moreover, our fitting shows that the column density of scatter component varies from phase to phase.