The Cause of Coherence?
3D MHD simulation of Ostriker, Gammie & Stone (1998)
Loss of magnetic support due to low ionization fraction in core. (Scale gives clues.)
Interesting question raised:
What causes residual non-thermal line width?
Notes:
decision is to just use Taurus as an illustration, because Ophiuchus will take too much time?? show Ophiuchus only in p-AV plots