TL;DR
This paper reviews the processes involved in the formation and evolution of disk galaxies, emphasizing star formation, gravitational instability, gas accretion, merging, and feedback, and compares theoretical models with observational data.
Contribution
It provides a comprehensive review of current theories and observations related to disk galaxy formation and discusses future research directions.
Findings
Star formation is central to disk galaxy evolution.
Observational constraints include the Schmidt-Kennicutt law and Tully-Fisher relation.
Future prospects involve refining models with new data.
Abstract
Global star formation is the key to understanding galaxy disk formation. This in turn depends on gravitational instability of disks and continuing gas accretion as well as minor merging. A key component is feedback from supernovae. Primary observational constraints on disk galaxy formation and evolution include the Schmidt-Kennicutt law, the Tully-Fisher relation and the galaxy luminosity function. I will review how theory confronts phenomenology, and discuss future prospects for refining our understanding of disk formation.
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