Closing of the astrotail

Context. The structure of astrospheres depends on the interaction between host star and surrounding interstellar medium (ISM). Observations offer new opportunities to learn about details this interaction. Aims. aim work is study global astrospheres, concentrating case strong magnetic field low relative velocity ISM. Methods. We used a simple magnetohydrodynamical numerical code simulate stellar wind ISM, using different assumptions strength, star, parameters medium. From resulting time-stationary solutions, we derived mass flux distribution plasma inside astrosphere, with particular attention flow topology. Results. find that tube-like topology astrosphere can occur for an strength 7 µG (a realistic value in Galactic disk region), provided ISM enough (0.5 km s −1 ). two-stream appears some extent all our models.