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Paper: Concentric Semi-Circular Rings/Arcs
Volume: 313, Asymmetrical Planetary Nebulae III
Page: 247
Authors: Su, K.Y.L.
Abstract: Concentric semi-circular arcs/rings have been seen in six PPNs, twelve PNs and one AGB star, which provides crucial insights into the AGB mass loss history and mechanism. Here I review the observational facts of the rings/arcs (summary properties in Table 1), and some models accounting for them.
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