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Table 8
Average pitch angles of spiral arm structures of polarised intensity and magnetic pitch angles of the ordered field of NGC 628.
| Spiral feature | Azimuthal range (°) | Radial range (′) | Morphological pitch angle (°) | Magnetic pitch angle (°) | ||||||||||||||||
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| 1A | 264–344 | 0.22–1.04 | +25 ± 2 | +50 ± 8 | ||||||||||||||||
| 1B | 310–402 | 0.72–0.98 | +9 ± 1 | +40 ± 7 | ||||||||||||||||
| 1C | 336–76 | 0.66–1.38 | +20 ± 2 | +32 ± 10 | ||||||||||||||||
| 1D | 114–210 | 1.34–1.36 | +2 ± 2 | +27 ± 8 | ||||||||||||||||
| 2 | 118–206 | 0.26–1.18 | +30 ± 3 | +42 ± 8 | ||||||||||||||||
| 3A | 162–244 | 0.26–0.86 | +23 ± 2 | +43 ± 7 | ||||||||||||||||
| 3B | 244–284 | 0.86–1.42 | +40 ± 2 | +43 ± 7 | ||||||||||||||||
| 3C | 284–324 | 1.42–1.76 | +24 ± 2 | +46 ± 9 | ||||||||||||||||
Notes. Note that the pitch angle is positive for a spiral that is winding outwards in the counter-clockwise sense.
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