Conditions for accretion disc formation and observability of wind-accreting X-ray binaries

Understand

We explore the effect of anisotropic wind driving on the properties of accretion onto black holes in close binaries.

• We specifically focus on line-driven winds, which are common in high-mass X-ray binaries.
• In close binary systems, the tidal force from the companion star can modify the wind structure in two different ways.
• One is the reduction of wind terminal velocity due to the weaker effective surface gravity.