Table 3
Magnetic field strengths, ΣSFR, and ldif in 5 nearby galaxies.
| Galaxy | B tot | B ord | B tur | Bord/Btur | ΣSFR | l dif |
| (μG) | (μG) | (μG) | (M⊙ Gyr-1 pc-2) | (pc) | ||
|
|
||||||
| M 31 | 6.6 ± 0.3 | 4.3 ± 0.3 | 5.0 ± 0.2 | 0.86 ± 0.07 | 0.6 ± 0.1 | 730 ± 90 |
| M 33 | 8.1 ± 0.5 | 2.8 ± 0.3 | 7.6 ± 0.5 | 0.37 ± 0.05 | 3.0 ± 0.6 | <400 |
| NGC 6946 | 16.0 ± 1.5 | 9.9 ± 2.1 | 12.6 ± 2.7 | 0.79 ± 0.24 | 7.1 ± 1.8 | 1700 ± 200 1 |
| LMC | 4.2 | 1.1 2 | 4.1 2 | 0.27 ± 0.10 | 2.6 3 | 200 ± 90 4 |
| M 51 | 19.7 | 11.5 5 | 16.0 5 | 0.72 ± 0.26 | 12 6 | >500 7 |
Notes. Note that apart from ldif all values refer to 30′ < R < 50′ in M 31, R < 21′ in M 33, R < 3.9′ in M 51, and R < 3.8° in the LMC.The 30 Dor region and the star-forming ridge are not considered for the LMC. For M51, ldif is determined from the total radio continuum-IR correlation (see text).
Reference. 1) Tabatabaei et al. (2013); 2) Gaensler et al. (2005); 3) Whitney et al. (2008), revised for a Salpeter IMF; 4) Hughes et al. (2006) and (in prep.); 5) Fletcher et al. (2011); 6) Leroy et al. (2008); 7) Dumas et al. (2011).
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