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. 2017 Feb 22;4(2):160271. doi: 10.1098/rsos.160271

Figure 8.

Figure 8.

Poloidal field configurations. (a) All field lines close outside the star, this field is unstable by an argument due to Flowers & Ruderman [78]. For the case where some field lines are closed inside the star, instability was demonstrated by Markey & Tayler [79,80] and Wright [81].