Comparison of different accelerations in the photoevaporation flow

[will-henney]

This is for the part of the introduction where Roberto is describing the approximations and assumptions behind the model

Estimate the acceleration due to pressure gradients and compare with other sources of acceleration. Specifically:

• Gravity of star
• Radiative acceleration from absorption of photons (relate this to gravity via the Eddington factor but corrected for the relevant opacities)
• Self-gravity of globule
• Magnetic pressure gradients