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Title: An asymmetric jet-launching model for the protoplanetary nebula CRL 618

We propose an asymmetrical jet-ejection mechanism in order to model the mirror symmetry observed in the lobe distribution of some protoplanetary nebulae (pPNs), such as the pPN CRL 618. Three-dimensional hydrodynamical simulations of a precessing jet launched from an orbiting source were carried out, including an alternation in the ejections of the two outflow lobes, depending on which side of the precessing accretion disk is hit by the accretion column from a Roche lobe-filling binary companion. Both synthetic optical emission maps and position-velocity diagrams were obtained from the numerical results with the purpose of carrying out a direct comparison with observations. Depending on the observer's point of view, multipolar morphologies are obtained that exhibit a mirror symmetry at large distances from the central source. The obtained lobe sizes and their spatial distributions are in good agreement with the observed morphology of the pPN CRL 618. We also obtain that the kinematic ages of the fingers are similar to those obtained in the observations.
Authors:
; ;  [1] ;  [2]
  1. Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Apdo. Postal 70-543, C.P. 04510 D.F. (Mexico)
  2. Departament de Física i Enginyeria Nuclear, EUETIB, Universitat Politècnica de Catalunya, Comte d'Urgell 187, E-08036 Barcelona (Spain)
Publication Date:
OSTI Identifier:
22370397
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 794; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ACCRETION DISKS; ASYMMETRY; COMPARATIVE EVALUATIONS; EMISSION; MIRRORS; PLANETARY NEBULAE; PROTOPLANETS; ROCHE EQUIPOTENTIALS; SIMULATION; SPATIAL DISTRIBUTION; SYMMETRY; THREE-DIMENSIONAL CALCULATIONS; VELOCITY