A law for star formation in galaxies
Abstract
We study the galactic-scale triggering of star formation. We find that the largest mass-scale not stabilized by rotation, a well defined quantity in a rotating system and with clear dynamical meaning, strongly correlates with the star formation rate in a wide range of galaxies. We find that this relation can be understood in terms of self-regulation towards marginal Toomre stability and the amount of turbulence allowed to sustain the system in this self-regulated quasi-stationary state. We test such an interpretation by computing the predicted star formation rates for a galactic interstellar medium characterized by lognormal probability distribution function and find good agreement with the observed relation.
Cite
@article{arxiv.1104.3596,
title = {A law for star formation in galaxies},
author = {Andres Escala},
journal= {arXiv preprint arXiv:1104.3596},
year = {2015}
}
Comments
13 pages, 2 figures, Accepted in ApJ