Possible scenarios for ECME mechanism to operate, (a) v_p(r) and v_B(r) for corona of AD Leo. v_B is found using Model 1 (Eq. (1)) and Model 2 (Eq. (2)). The observing band (v_obs ∊ [550, 850] MHz) and v_obs/3 are marked, (b) v_p/v_B(r) for two B(r) models and the ratios of v_p to v for v_obs and v_obs/3 are shown. Colour choice is the same as in the top panel. Red lines mark the r range where v_obs overlap v_B and green lines mark the overlap r range of v_obs/3 with v_B (solid line: Model 1, dashed: Model 2).