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Table 1

Parameters of the galaxy sample.

Galaxy D (Mpc) ΩP (km s-1/kpc) PA (degrees) i (degrees) 12 + log(O/H)Central Rotation curve

NGC 628 7.3 (1) 16 ± 3 (3) 11.8 (3) 6.5 (5) 8.77 (6) Helfer et al. (2003)
NGC 5457 7.2 (2) 72 ± 37 (3) 38 (2) 18 (2) 8.43 (7) Sofue (1997)
NGC 6946 5.5 (2) 39 ± 8 (4) 64 (2) 30 (2) 8.45 (6) Sofue (1997)

Notes. (1) Helfer et al. (2003); (2) Sofue et al. (1999); (3) Lu et al. (1993); (4) Zimmer et al. (2004); (5) Kamphuis & Briggs (1992); (6) Moustakas et al. (2010); (7) Cedrés et al. (2004).

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