The effects of induced star formation on the evolution of the galaxy. II - The galactic ecosystem

Abstract

view Abstract Citations (42) References (23) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The effects of induced star formation on the evolution of the galaxy. II - The galactic ecosystem Shore, S. N. Abstract The deterministic dynamical systems approach of Paper I is here generalized to the case of a disk galaxy with star-induced star formation. It is shown that the cases of a rigidly rotating axisymmetric and nonaxisymmetric, and a differentially rotating galaxy model can be solved explicitly. The results are compared with stochastic simulations. A wave of star formation, propagating outward from the central portion of an active region, is found. The velocity and properties of this star formation front are examined. A two-phase model with time delays is also presented, which can be used for modeling sequential star formation. In this case, critical initial gas and star fractions are presented. Finally, a brief discussion is presented of the stochastic generalization of the one-zone model for a two-phase galaxy with and without infall. Publication: The Astrophysical Journal Pub Date: February 1983 DOI: 10.1086/160664 Bibcode: 1983ApJ...265..202S Keywords: Astronomical Models; Disk Galaxies; Galactic Evolution; Galactic Rotation; Star Distribution; Star Formation; Dwarf Galaxies; Dynamic Models; Galactic Structure; Spiral Galaxies; Stochastic Processes; Time Lag; Astrophysics full text sources ADS |