Speaker
Description
The black hole candidate low-mass X-ray binary Swift J1727.8-1613 experienced one of the brightest outbursts ever observed in an X-ray binary in August 2023. Since then, this unique source has been observed across the entire electromagnetic spectrum. XMM-Newton monitored the low-mass X-ray binary for 3 days as it transitioned from the soft state – dominated by the multi-blackbody emission from the accretion disk – to the hard state – dominated by the comptonized emission from the hot corona. While disk winds are usually detected in the hard-to-soft transition, very few sources have been studied in the soft-to-hard transition, when the X-ray flux drops by several orders of magnitude. Here, we present the rare case of X-ray spectroscopy and spectral analysis in the decaying phase of the outburst using high-resolution XMM-Newton spectra. These results can give us valuable insight into the presence of outflows in the soft-to-hard transition of low-mass X-ray binaries.
