Large-scale expanding superstructures in galaxies
G. Tenorio-Tagle, P. Bodenheimer;
ARAA, 1988, 26, 145

ABSTRACT:Recent observational and theoretical investigations of large (100 pc or greater) expanding shell-type structures in galaxies are reviewed. The evidence from the Galaxy, the Magellanic Clouds, and other nearby galaxies is compiled in tables and analyzed, and consideration is given to theoretical models based on (1) the effect of stars in clusters and associations (SN explosions and stellar winds, galactic differential rotation, and expanding H II regions), (2) the effect of radiation pressure, and (3) cloud/galactic-disk collisions. The sensitivity of the model predictions to assumptions about the initial condition of the interstellar matter and the star-formation process is discussed, with a focus on the close interrelationship of star formation, stellar evolution, and the interstellar medium.
KEYWORDS: galactic structure, interstellar matter, magellanic clouds, milky way galaxy, h alpha line, h i regions, h ii regions, irregular galaxies, kinetic energy, radiation pressure, spiral galaxies, star clusters
PERSOKEY:supershell, ,
CODE: tenorio-tagle88