PPT Slide
- Large collision region High photochemical heating efficiency => large v, T
- Inner coma optically thick to UV At 1 AU: out to 500-1000 km for dissociating water out to 3000 km for ionizing water
- Large gas densities produce large velocities for more than just the small sub-micron dust particles
- Observed vs. Model outflow speeds and temperatures Observed (Biver et al. 1998; Colom et al. 1998)