1) Standard Model: Spherical Fast Wind/Aspherical Slow Wind
(Delemarter, Vieira and Frank 2000)

A fast wind runs into a preexisting torus.  This model is the best the fit to the Egg which shows that the GWBB model
does not work for that nebulae.

2) Variation on the Theme: Spherical Ambient Meduim/Aspherical Fast Wind
(Frank, Ryu and Davidson 1998)

This model may be applicable to LBVs where a "slow torus" may not exist.  Figure shows log density (red = high, blue = low)

3) Magnetized Wind Bubble: (ala Chevalier & Luo 1994, Garcia-Sequra et al 1999)
This model comes from a paper in progress (Gardiner and Frank 2000)

This figures shows a Spherical Fast Wind/Aspherical Slow Wind case but now the fast wind has a strong toroidal field embedded in it.
On left a wind with V = 200 km/s (strong cooling).  On the right V = 600 km/s (weaker cooling).  Without the field the bubble would look like
figure 1.  The axial "jet" comes from strong pinching via the toroidal field.

Fig shows log density, color bar at bottom (yellow = high)