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Table 1

Comparison of the location of the vertical resonances in the two models along the major axis of the bar.

Vertical resonances E* E*
(N-body) (Ferrers) (N-body) (Ferrers)
2:1 (a) 0.921 0.334 0.694 0.125
2:1 (b) 0.952 0.370 0.745 0.146

3:1 (a) 1.003 0.515 0.912 0.254
3:1 (b) 0.558 0.287

4:1 (a) 0.866 0.597
4:1 (b) 0.895 0.633

Notes. Each row successively gives the name of the vertical resonance, the relative energy E* (see text) of each resonance for the N-body model and the Ferrers bar respectively and finally the maximum length of the x1 orbits at the resonance (their apocentra), normalized over the L1 radius, for the two models.

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