Multiwavelength Observations of the Peculiar Planetary Nebula IC 2149

Astronomy and Astrophysics – Astronomy

Scientific paper

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Ism: Kinematics And Dynamics, Ism: Planetary Nebulae: Individual: Alphanumeric: Ic 2149, Stars: Agb And Post-Agb

Scientific paper

We report high- and low-dispersion spectroscopy, optical imaging, and high-resolution Very Large Array-A λ3.6 cm continuum observations of the peculiar planetary nebula IC 2149. These observations show that ``bipolar'' is a suitable morphological classification for IC 2149. Most nebular material is concentrated in a knotty, bright ring seen edge-on, embedded in an apparently oblate ellipsoidal shell from which remnant or incipient bipolar lobes emerge. We confirm the previously reported depletion in heavy elements and deduce a very low ejected nebular mass <~0.03 Msolar. All this information indicates that the formation of IC 2149 is the result of the evolution of a low-mass central star.

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