I've been watching a few documentaries lately on the 25th anniversary of HST so I wanted to get a Hubble palette shot of Eta Carinae before it gets too low. In spite of the dreadful weather I managed 400 minutes of SII and also added a bit of RGB for the stars. Not sure where it sits with respect to the HaOIIIOIII but it's certainly more colorful.
Good work with the SII. What it seems to be saying to me is that although the SII is brightest where there is the most stuff, e.g. near the keyhole (you can't have SII emission without sulphur), the place where it is brighter relative to H-alpha is way out in the suburbs, where the gas is extremely thin, and the SII forbidden transition (which struggles to occur in dense material because it is prevented by thermal collisions) can happen unimpeded. So new information compared with just H-alpha and OIII.
Good work with the SII. What it seems to be saying to me is that although the SII is brightest where there is the most stuff, e.g. near the keyhole (you can't have SII emission without sulphur), the place where it is brighter relative to H-alpha is way out in the suburbs, where the gas is extremely thin, and the SII forbidden transition (which struggles to occur in dense material because it is prevented by thermal collisions) can happen unimpeded. So new information compared with just H-alpha and OIII.
Best,
Mike
Thanks Mike. Yes the SII adds interesting depth that the previous image didn't have.
Absolutely brilliant image Steve! I love the colours and the crisp details is the icing on the cake
Can't really decide between the HaOIIIOIII and the HST palette, I love them both and they compliment each other well.
Absolutely brilliant image Steve! I love the colours and the crisp details is the icing on the cake
Can't really decide between the HaOIIIOIII and the HST palette, I love them both and they compliment each other well.
Thanks Rolf. I think the HaOIIIOIII is marginally sharper but the HST palette has nicer colour.
