Stellar feedback is central to galaxy evolution, linking the small-scale physics of massive stars to the large-scale structure of the interstellar medium. In this talk, I will present our recent work on how feedback interacts with gas and dust across a range of environments, ranging from star-forming clouds and stellar clusters to circumstellar shells and galactic disks.
I will first discuss the dynamical impact of feedback on the gas.Stellar feedback inject energy and momentum into their surroundings, producing expanding bubbles, and shells, whose evolution depends on the density, metallicity, and structure of the ambient medium. I will present our studies on metallicity-dependent star formation, massive star cluster formation, and H I holes in nearly face-on galaxies. In the latter case, the observed morphology and kinematics of the holes provide constraints on the gas distribution, disk structure, and feedback history of the host galaxy.
The second part is focused on the fate of dust processed by shocks. I will present cases involving recurrent novae, where shock-heated gas in nested shells can account for X-ray emission, and massive stars, where supernova shocks interact with dusty circumstellar shells produced by previous eruptive mass loss. These systems illustrate how feedback can simultaneously generate observable high-energy emission and determine whether dust is destroyed, survives, or is transported into the surrounding medium. Finally, I will discuss how feedback-driven blowout in compact star-forming galaxies may vent gas and dust from young systems, potentially explaining the apparent dust deficit in some very early galaxies.
