Fig. 2
Scatter plot of the flux tube expansion factors. Each point represents the asymmetric and symmetric factors ϵ1 and ϵ2, respectively, for the same flux tube. The flux tubes are from Luna et al. (2012b; triangles) and from Terradas et al. (2013; big dot). The vertical and horizontal dashed lines corresponds to the average values of ϵ1 and ϵ2 factors, respectively.
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