Quote:
Originally Posted by multiweb
I have imaged this area repeatedly in the past at various focal lengths in Ha and more recently in infrared. The shells seem to be going on both sides of the milkyway band, up and down.
Hydrogen Alpha: 35mm, 50mm, 100mm
Infrared: 100mm |
Marc,
very good observations, and an extremely interesting interpretation.
As I suggested in my previous post, it may be necessary to subtract out the stellar red light contribution from the light that is admitted by the Ha filter, in order to go further in our understanding of the structures of extremely faint nebulae like this one.
(there are various mathematical "fudge factors" that model stellar light in the red band)
Also, there is a lot of diffuse Ha which makes it hard to see the outlines of individual HII regions.
Robert