Invited Presentation

Bubbles Big and Small: Impact on Galaxy Evolution

You-Hua Chu (ASIAA)

Massive stars inject energy into the interstellar medium (ISM) via UV radiation, fast stellar winds, and supernova explosions. The stellar energy feedback form shell structures in the interstellar medium (ISM). The shell sizes depend on the distribution and history of star formation. Interstellar shells consist of heated and accelerated ISM and affect future star formation. The largest shells can puncture the gaseous disk of a galaxy and produce outflows into the galactic halo. Thus, interstellar shells play an important role in galaxy evolution. I will use the shells in nearby galaxies to illustrate their physical structures and their impact on the host galaxies.