Discs and outflows in the early phases of massive star formation: Influence of magnetic fields and ambipolar diffusion

Open Access

Fig. 11

Maps of Toomre parameter Q in the rotation plane when the sink mass is ≈10 M_⊙ for the runs HYDRO, MU5I, MU2AD, MU5AD, and MU5ADf, from left to right. Only the disc material is used to compute the Toomre parameter as explained in the main text. The colour map indicates the logarithm of Q, with blue (respectively red) indicating Q < 1 (respectivelyQ > 1) regions.

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