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Shaping proto-planetary nebulae by binary systems

Published online by Cambridge University Press:  30 August 2012

A. Riera ,
P. F. Velázquez ,
W. Steffen ,
A. C. Raga  and
J. Cantó
A. Riera
Affiliation:
Departament de Física i Enginyeria Nuclear, EUETIB, Universitat Politécnica de Catalunya Compte d'Urgell 187, 08036 Barcelona, Spain email: angels.riera@upc.edu
P. F. Velázquez
Affiliation:
Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, México D.F., México
W. Steffen
Affiliation:
Instituto de Astronomía, Universidad Nacional Autónoma de México, Ensenada, México
A. C. Raga
Affiliation:
Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, México D.F., México
J. Cantó
Affiliation:
Instituto de Astronomía, Universidad Nacional Autónoma de México Apdo. Postal 70-242, CP: 04510, D.F., México
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Abstract

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We present the results of 3D hydrodynamic simulations aimed to explore the binary scenario for shaping bipolar, point- and mirror-symmetric proto-Planetary Nebulae. We consider a jet launched by the secondary star of a binary system, located at the center of the PPN, which propagates within a circumstellar medium swept previously up by the wind of the giant companion. As a result of the presence of the companion star, the accretion disk around the jet source is likely to precess. We have carried out 3D hydrodynamical simulations with the YGUAZÚ-A code including the combination of an orbital motion plus a precession. Our results show that to produce a multipolar nebula, it is necessary to have a precessing jet in a binary system with a time-dependent ejection velocity.

Keywords

Planetary nebulae: generalISM: jets and outflows
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 7 , Symposium S283: Planetary Nebulae: An Eye to the Future , July 2011 , pp. 103 - 106
Copyright
Copyright © International Astronomical Union 2012

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