Analysis fit to the effective recombination coefficients for the N ii V3 3p ³D₃–3s ³Pλ5679.56 line, at N_e = 1000 cm^-3. Sub-figure a) shows the data fit for the low-temperature regime T_e < 10   000 K, and Sub-figure b) for the high-temperature regime 10   000 ≤ T_e ≤ 20   000 K. In both Sub-figures, solid lines are fitting equations (Eq. (3) for Sub-figure a) and Eq. (4) for b)), and plus signs “+” are the calculated data for all the temperatures.