Wind morphology around cool evolved stars in binaries: The case of slowly accelerating oxygen-rich outflows

摘要: The late stellar evolutionary phases of low and intermediate-mass stars are strongly constrained by their mass-loss rates. wind surrounding cool evolved frequently shows non-spherical features, thought to be due an unseen companion orbiting the donor star. We study morphology circumbinary envelope, in particular around oxygen-rich asymptotic giant branch (AGB) stars. run a grid 70 3D hydrodynamics simulations progressively accelerating propagating Roche potential formed mass-loosing star orbit with main sequence companion. resolve flow structure both immediate vicinity secondary, where bow shocks, outflows wind-captured disks form, up 40 orbital separations, spiral arms, arcs equatorial density enhancements develop. When is deeply engulfed wind, lower terminal speeds more progressive acceleration AGB make them prone than carbon-rich display disturbed outflows, disk-like concentrated plane. In these configurations, large fraction captured which leads significant shrinking over timescale, if at least few times massive its Provided has mass tenth star, it can compress plane distances. Our models covers wide scope configurations function dust chemical content, speed relative speed, extension condensation region ratio. It provides frame reference interpret high-resolution maps