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