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The central stars

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Termination of the AGB phase8. Attachments (Figures)Fig. 1: Illustration of the magnetic field collimating the 22 GHz H2O maser jet of W43A. <strong>The</strong> toroidal field isindicated by the ellipses around the precessing jet. <strong>The</strong> ellipses are scaled with magnetic field strength. <strong>The</strong>solid black circles denote the observed H2O masers and the vectors are the direction of the magnetic field asdetermined from the maser linear polarization.He2-47, young PNHST imageSahai & TraugerFig. 2: <strong>The</strong> biconical distribution of the 43 GHz SiO masers close to the stellar photosphere of W43A.- 4 -8. Attachments (Figures)W43A, OH/IR starFig. 1: Illustration of the magnetic field collimating the 22 GHz H 2 O maser jet of W43A. <strong>The</strong> toroidal field isVLBA imageImai et al.Magnetic collimationindicated by the ellipses around the precessing jet. <strong>The</strong> ellipses are scaled with magnetic field strength. <strong>The</strong>solid black circles denote the observed H 2 O masers and the vectors are the direction of the magnetic field asdetermined from the maser linear polarization.(H 2 O, 22 GHz, pol)Vlemmings et al.

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