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Radiatively Driven Winds and the Formation of Bipolar Planetary Nebulae

Published online by Cambridge University Press:  26 May 2016

Vikram V. Dwarkadas  and
Stanley Owocki
Vikram V. Dwarkadas
Affiliation:
Bartol Research Institute, Univ of Delaware, 217 Sharp Lab, Newark, DE 19716
Stanley Owocki
Affiliation:
Bartol Research Institute, Univ of Delaware, 217 Sharp Lab, Newark, DE 19716

Abstract

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We study the role of radiatively driven winds in the formation of PNe. The modulation of these winds due to stellar rotation, and Von Zeipel gravity darkening, are both considered. Rotation produces a wind that is faster at the poles but denser at the equator. The Von Zeipel effect, which states that the stellar flux is proportional to the effective surface gravity, results in the inverse density distribution, giving a wind that is both faster and denser at the poles. Both these effects produce bipolar nebulae for large rotational velocities of the star.

Type
Part VII: Nebular Morphology and Dynamics
Information
Symposium - International Astronomical Union , Volume 209: Planetary Nebulae: Their Evolution and Role in the Universe , 2003 , pp. 467 - 470
Copyright
Copyright © Astronomical Society of the Pacific 2003 

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