Feedback, Disk Self-regulation and Galaxy Formation
Astrophysics
2010-11-23 v2
Abstract
Self-regulation of star formation in disks is controlled by two dimensionless parameters: the Toomre parameter for gravitational instability and the porosity of the interstellar medium to supernova remnant-heated gas. An interplay between these leads to expressions for the gas fraction and star formation efficiency in disks, and to a possible explanation of the Tully-Fisher relation. I further develop feedback arguments that arise from the impact of massive star formation and death on protogalaxies in order to account for the characteristic luminosity of a galaxy and for early winds from forming spheroids.
Cite
@article{arxiv.astro-ph/9612117,
title = {Feedback, Disk Self-regulation and Galaxy Formation},
author = {Joseph Silk},
journal= {arXiv preprint arXiv:astro-ph/9612117},
year = {2010}
}
Comments
13 pages, Tex, ApJ accepted