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1 Introduction
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2 Observations
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3 The radio maps
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4 The global magnetic structures
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5 The central regions
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6 The X-ray halo of NGC 1097
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7 Models of gas flow and magnetic field in the bar region
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8 Magnetic field compression and shearing in the radio ridge of NGC 1097
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9 Mass inflow through the nuclear ring of NGC 1097
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10 Summary and conclusions
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References
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Online Material
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Appendix A: The effect of compression and shear on a random magnetic field
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Appendix B: Parameters of the fitted regular magnetic fields
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