Tiny-Scale Atomic Structure and the Cold Neutral Medium--Review and Recap
Astrophysics
2007-05-23 v1
Abstract
Almost a decade ago I wrote an article with the same title as this. It focused on the physical properties of the Tiny-Scale Atomic Structure (TSAS) as discrete structures of the Cold Neutral Medium (CNM). To be observable, tiny discrete structures that don't grossly violate pressure equilibrium need two attributes: low temperatures and geometrical anisotropy. Here I update that article. I discuss thermal and pressure equilibrium, ionization, optical lines, H_2 abundance, and evaporation.
Cite
@article{arxiv.astro-ph/0701625,
title = {Tiny-Scale Atomic Structure and the Cold Neutral Medium--Review and Recap},
author = {Carl Heiles},
journal= {arXiv preprint arXiv:astro-ph/0701625},
year = {2007}
}
Comments
Invited paper at the workshop, "Small Ionized and Neutral Structures in the Diffuse Interstellar Medium", eds. M. Haverkorn and W.M. Goss (ASP Conference Series)