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A morpho-kinematic and spectroscopic study of the bipolar nebulae: m 2−9, mz 3, and hen 2−104
(EDP Sciences, 2015-10-01)
Context. Complex bipolar shapes can be generated either as a planetary nebula or a symbiotic system. The origin of the material ionised by the white dwarf is very different in these two scenarios, and it complicates the ...