Multiple, Coeval and Hubble-Like Bipolar Outflows

Details Multiple, Coeval and Hubble-Like Bipolar Outflows Multiple, Coeval and Hubble-Like Bipolar Outflows

Jul 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aspc..313..148c&link_type=abstract

Asymmetrical Planetary Nebulae III: Winds, Structure and the Thunderbird, Proceedings of the conference held 28 July - 1 August

Astronomy and Astrophysics

Astronomy

13

Scientific paper

Multiple pairs of lobes are not often found in evolved planetary nebulae (PNe), contrary to what observed in proto-PNe. I review our current knowledge about the frequency and kinematical properties of this kind of multiple collimated outflows, which might be related to misclassified objects like symbiotic stars.
In addition, I show that most bipolar PNe show rather simple velocity fields that can be described by a ``Hubble law'' (Vexp∝ r), indicating that the nebulae have reached their asymptotic shape, and that the shaping is done in relatively short timescales.

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