Although there are several deep H-alpha surveys conducted by professionals, there are no modern surveys in the other filters (deep H-alpha, H-beta, OIII. and SII).

 

John will talk about what we see in each of these filters, the physics of what is going on, and discuss how deep imaging by amateurs can make a contribution.  

 

He is specifically interested in shocks (which are well traced by these filters) that may trace fossil outflows and explosive phenomena in star forming regions. 

 

John is looking for amateurs to help in narrow-band imaging of nearby HII regions and star-forming complexes using narrow-band filters.