Radio polarization and magnetic field structure in M 101

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Table 1

Adopted parameters on M 101.

Variable	Value	Reference

Distance D (Mpc)	7.4 (1′ = 2.15 kpc)	Kelson et al. (1996)
Centre position (RA, Dec)₂₀₀₀		Israel et al. (1975)
Position angle PA	38°	Kamphuis (1993)
Inclination i^a	30° (face-on i = 0°)	Kamphuis (1993)
Radius in colour B: R₂₅	8′	Mihos et al. (2013)
Radius in colour B: R_29.5	25′	Mihos et al. (2013)
Radius in H i	27′	Kamphuis (1993)
Hubble type	SAB(rs)cd	de Vaucouleurs et al. (1976)

Notes.

^(a)

Kamphuis derived different inclination angles for radii R< 7′ (27°) and R> 7′ (25° in SW and 40° in NE). As our data extend to R ~ 15′, we adopted a mean value of i = 30°.

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