Description
Chair: C. Done (university of Durham)
Despite decades of research, predicting outbursts of X-ray transients, and witnessing their beginning stages, remains very challenging. The cause of these X-ray brightenings is thought to be the sudden increase of accretion of matter onto a black hole or neutron star, initiated by the ionization of hydrogen in the accretion disc. I present recent observational advances in our understanding of...
Usually, X-ray binary (XRB) outbursts are first detected by X-ray all-sky monitors like MAXI. Only after this are observations with more sensitive multi-wavelength telescopes triggered. This causes a gap in the coverage of the rise of the outbursts, limiting our knowledge of their early stages. Therefore, the best approach to better understand the accretion process in XRBs is to combine X-ray...
Multi-wavelength observations are essential to understand the coupling between the accretion flow and the jet in black hole X-ray binary (BHXRB). We investigate the X-ray and radio emissions in MAXI J1348-630 during its 2019 outburst. For the first time, we find that the radio emission lags behind the X-ray Comptonization emission by about 3 days during the rising phase covering the rising...
Swift/BAT first reported the detection of the X-ray transient Swift J1727.8-1613 on 2023 August 24 (Page+2023). Optical observations revealed that Swift J1727.8-1613 has a black hole candidate larger than 3.2 Msun and a K4V donor (Mata Sanchez+2023). Black hole X-ray binaries have an accretion state responsible for the ejection of large-scale or compact jets. The formation process of these...
