Table 6.
Best-fitting cosmic ray diffusion models.
| Galaxy | UIRF/UB | D0 | μ |
|---|---|---|---|
| (1028 cm2 s−1) | |||
| (1) | (2) | (3) | (4) |
| NGC 3184 | 0.16 |
 |
0.5 |
| NGC 4736 | 0.46 |
 |
0.6 |
| NGC 5055 | 0.10 | N/A | N/A |
| NGC 5194 | 0.18 |
 |
0.0 |
Notes. NGC 5055 will be analysed separately in a forthcoming paper (Sendlinger et al., in prep.). Columns: (1) galaxy name; (2) ratio of the interstellar radiation field energy density (excluding the contribution from the cosmic microwave background) to the magnetic energy density; (3) 2D diffusion coefficient at 1 GeV, where the uncertainty interval is for 3D (lower) and 1D (upper bound); (4) energy dependence of the diffusion coefficient parametrised as D = D0(E/GeV)μ.
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