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Published online by Cambridge University Press: 19 July 2016
The kinematics of the gas motions in several e-m E planetary nebulae (PNs) have been mapped with ∼ 1 - 2″ resolution. All of the eE PNs (e.g., NGC 2392, 3242, 6543, 6826, 7009, and 7662) show evidence of highly focused linear flows at projected velocities of 20 - 170 km s−1. The flows generally appear as linear, almost jet-like features in emission lines of low ionization. mE PNs show expanding protuberances along their polar axes.