Theoretical models of star formation.
Abstract
The presented review covers the star formation process in a more or less chronological sequence. It is discussed how a state of gravitational instability can be approached from a more diffuse gaseous state in which gravitational forces are unimportant. Attention is given to the Parker instability, a thermal instability, the approach to gravitational instability by agglomeration of stable clouds, the initiation of cloud collapse by a sudden increase in surface pressure, the implosion of gas clouds by spiral-arm shocks, and the implosion of clouds with magnetic fields. Possible chain reactions of star formation are considered, taking into account strong stellar winds, supernova explosions, and the expansion of H II regions. The collapse of an unstable cloud under gravity is also discussed.
- Publication:
-
Annual Review of Astronomy and Astrophysics
- Pub Date:
- 1978
- DOI:
- 10.1146/annurev.aa.16.090178.003011
- Bibcode:
- 1978ARA&A..16..555W
- Keywords:
-
- Cloud Physics;
- Cosmology;
- Gravitation Theory;
- Gravitational Collapse;
- Star Formation;
- Stellar Models;
- H Ii Regions;
- Implosions;
- Shock Waves;
- Stellar Envelopes;
- Stellar Mass Accretion;
- Stellar Rotation;
- Structural Stability;
- Astrophysics;
- Collapse:Interstellar Clouds;
- Star Formation: Models