2007/01/22 by Carl Heiles, Heiles, Carl
Chemistry · Physics and Astronomy · #Astrophysics (astro-ph) #Atomic and Subatomic Physics Research #Cold Atom Physics and Bose-Einstein Condensates #FOS: Physical sciences #Spectroscopy and Laser Applications #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/0701625
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)
arxiv created 2007/01/22 · openalex publication_date 2007/01/22 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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, H2 abundance, and evaporation.