Evolution of the asymmetric multi-phase disc atmosphere in the X-ray binary MXB1659-298, during its 2015-2016 outburst
Abstract
Equatorial winds and disc atmospheres are fundamental components of accretion onto compact objects and they are typically traced through ionised absorption lines. I will report the analysis of the Chandra HETG, XMM and NuSTAR monitoring campaign of the last outburst of the high-inclination (eclipsing) transient neutron star Low Mass X-ray Binary MXB1659-298. We detected more than 60 absorption lines during the soft state HETG+NuSTAR observation, while only stringent upper limits are observed during the hard state. I will discuss the importance of thermal instabilities for this effect. We also observed, for the first time, a modulation of the intensity of the ionised absorption lines with orbital phase. I will finally discuss how these results shed new light onto our picture of the accretion phenomenon.
- Publication:
-
42nd COSPAR Scientific Assembly
- Pub Date:
- July 2018
- Bibcode:
- 2018cosp...42E2708P