High-Resolution Spectroscopy of the Planetary Nebulae PM 1242, PM 1318 and PM 1322

We have recently confirmed the planetary nebula (PN) nature of PM 1242, PM 1318 and PM 1322. Here we present high-resolution long-slit spectra of these three PNe in order to analyze their internal kinematics and to investigate their physical structure. PM 1242 is a tilted ring and not an elliptical PN as suggested by direct images. The object is probably related to ring-like PNe and shows an unusual point-symmetric brightness distribution in the ring. PM 1318 is a pole-on elliptical PN, instead of a circular one as suggested by direct images. PM 1322 is spatially unresolved and its spectrum shows large differences between the forbidden lines and H profiles, with the latter showing a double-peaked profile and relatively extended wings (FWZI ∼325 km s -1). These properties are found in other PNe that are suspected to host a symbiotic central star. © Astronomical Society of Australia 2010.