Description
Chair: M. Shidatsu (Ehime U.)
The transient X-ray outbursts of galactic binaries give some of the most spectacular lightcurves seen by MAXI and other monitoring instruments. I will review what these reveal about the accretion flow, and how it links to the transient radio jets. The luminous accretion flow also powers winds, now revealed in exquisite detail in XRISM, and I will speculate on how these relate to the accretion...
In a steady mass flow from a companion star to a compact object in an X-ray binary, the inflowing matter from the companion star is expected to carry a certain amount of specific angular momentum and to first form a geometrically thick ring tube along the Keplerian circular orbit, which is called the accretion ring. A study of the accretion ring by Inoue (2021, PASJ, 73, 795) showed that a...
We present the results of three-dimensional global radiation magnetohydrodynamic simulations of state transitions in black hole candidates. During the hard-to-soft state transition, accretion flow near the black hole tends to be in optically thin hot state even when the accretion rate exceeds the upper limit for RIAF in the outer region. In such state, RIAF near the black hole co-exists with...
Despite having one of the most detailed outburst coverage among BHLMXBs, the long term behavior of the wind in 4U 1630-47 remains poorly known. We thus performed an exhaustive study of archival X-ray observations of the source, combining Chandra, NICER, NuSTAR, Suzaku and XMM-Newton, for more than 200 epochs spanned over 9 separate outbursts and two decades, complemented by Swift-BAT and...
Accretion disk winds in compact objects in low-mass X-ray binaries, suggested by the blue-shifted absorption lines in spectroscopic data, are important phenomena to address the understanding of the physics of AGN feedback. However, the driving mechanisms of the winds are unclear. To tackle this, we build a comprehensive model for X-ray spectra, where the detail line profiles are simulated by...
