Mass-Loaded Flows - Part Seven - Transonic Flows from the Cores of Planetary Nebulae

Details Mass-Loaded Flows - Part Seven - Transonic Flows from the Cores of Planetary Nebulae Mass-Loaded Flows - Part Seven - Transonic Flows from the Cores of Planetary Nebulae

Aug 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994mnras.269.1117a&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Vol. 269, NO. 4/AUG15, P.1117, 1994

Astronomy and Astrophysics

Astronomy

29

Scientific paper

We present simple analytical and more detailed numerical models of the flow resulting from the mass loading of a fast stellar wind in the core region of a planetary nebula. It is found that, for mass-loading rates above a critical value, the flow leaving the core will always be transonic. We suggest that this mass-loading model provides a simple explanation for the observed high electron temperatures m the haloes of some planetary nebulae. The model has been applied to the core-halo planetary nebula NGC 6543. It is found that the mass-loading rate required to ensure a transonic flow leaving the core does not conflict with estimates of the available progenitor mass. Key words: hydrodynamics - shock waves - stars: mass-loss - ISM: kinematics and dynamics - planetary nebulae: individual: NGC 6543.

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