By considering the finite mass of Fraternite, the dynamic nature of the Adamsring arcs is regarded as caused by the reaction of a test body (a minor arc)through the Lindblad resonance (LR). Assumming the eccentricity of the testbody is larger than that of Galatea, this generates several locations along thering in the neighborhood of Fraternite where the time averaged force on a testbody vanishes. These locations appear to correspond to the time dependentconfiguration of Egalite (2,1), Liberte, and Courage, and seem to be able toaccount for the dynamics of the arcs. Such a configuration is a dynamic onebecause the minor arcs are not bounded by the corotation eccentricity resonance(CER) externally imposed by Galatea, but are self-generated by LR reacting tothe external fields.
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