The «Local Bubble» of low - density, hot and
ionized gas, is actually part of a tube - like chimney that
extends through the local region of the spiral disk into the surrounding galactic halo, and so may can act as a vent for the energetic hot
gas produced by supernovae (more).
«The solar wind, because it is an
extended ionized gas of very high electrical conductivity, drags some magnetic flux out of the Sun, thereby filling the heliosphere with the weak interplanetary magnetic field.