Planetary Nebulae in the Scheme of Binary Evolution

Details Planetary Nebulae in the Scheme of Binary Evolution Planetary Nebulae in the Scheme of Binary Evolution

2002-01-22

arxiv.org/abs/astro-ph/0201357v1

Astronomy and Astrophysics

Astrophysics

Review, Proceedings of the IAU Sym. 209: Planetary Nebulae

Scientific paper

In this review I present the binary model for the shaping of planetary nebulae (PNe) as I view it, in the context of historical evolution of other models for the shaping of PNe over more than 30 years. In describing the binary model, I concentrate on works published since the last IAU meeting on PNe. I think stellar companions are behind the shaping of bipolar PNe, i.e., having two lobes with an equatorial waist between them, and extreme elliptical PNe, e.g., having a dense equatorial ring, but no lobes. The question of whether a planet is required to spin the progenitor in order to form a moderate elliptical PN, or whether a single stars can form moderate elliptical PNe, I consider to be an open question.

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