Fig. 10
Strengths (Q1, Q2, Q4 and total QT) and phases (φ1, φ2 and φ4) of the m = 1 (dash) m = 2 (full line) and m = 4 (dots) Fourier components of the stellar potential. The region of constant m = 2 phase delineates the extent of the bar (note the phase jumps by 2π/m). The φ-angles are measured from the + X axis in the counter-clockwise direction.
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