Quote:
Originally Posted by troypiggo
I know about the spectral lines and filters. I looked hard at this when I bought my Astrodons 
But that's got nothing to do with what the objects are actually emitting. What I'm asking is how you arrived at the objects are emitting 50/50 Ha and Nii, as opposed to what the filters can pass. From my reading it's more (some?) planetary nebulae than emission like Eta Carinae that emit Nii strongly. It makes sense to me that star forming regions would be stronger in H than N for the very reasons you mention.
I mean, just because you're wearing a baseball glove doesn't mean someone is throwing baseballs at you. |
I have done some images in NII and HA and have generally found the relative intensities to be about the same. Just do a search on avandonk and NII and OIII.
Here is one NII to green channel and HA to red.
http://d1355990.i49.quadrahosting.co...HH_HA_NII_.jpg
There are more.
Bert