I have a weird obsession with this PN for some reason. To fuel that, here's a recent paper from ArXiv on it. You may find this interesting.
http://fr.arxiv.org/abs/1509.01202
Stingray Nebula
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Glima49
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geckzilla
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Re: Stingray Nebula
Good luck figuring it out. I'm still boggling over the Red Rectangle.
Just call me "geck" because "zilla" is like a last name.
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Glima49
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Re: Stingray Nebula
Yes, this paper made me understand what happened to the star a lot better. It was an ordinary post-AGB protoplanetary and then suddenly, around 1980, bam! It's emission lines transformed to a planetary nebula suddenly. This gave an opportunity to watch the ionization of a post-AGB protoplanetary shell to a full-fledged planetary nebula. Very exciting and interesting case.geckzilla wrote:Good luck figuring it out. I'm still boggling over the Red Rectangle.