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Within the framework of modified Newtonian dynamics (MOND) we investigate thekinematics of two dwarf spiral galaxies belonging to very differentenvironments, namely KK 246 in the Local Void and Holmberg II in the M81 group.A mass model of the rotation curve of KK 246 is presented for the first time,and we show that its observed kinematics are consistent with MOND. We re-derivethe outer rotation curve of Holmberg II, by modelling its HI data cube, andfind that its inclination should be closer to face-on than previously derived.This implies that Holmberg II has a higher rotation velocity in its outerparts, which, although not very precisely constrained, is consistent with theMOND prediction.

Isolated and non-isolated dwarfs in terms of modified Newtonian dynamics