Emission measure distributions versus temperature for models with stream density n_acc = 10¹¹ cm^-3 (upper panels) and n_acc = 5 × 10¹¹ cm^-3 (lower panels). The figure shows the EM(T) derived for models either with (red and green lines) or without (blue) radiative heating and models either including (blue and green) or neglecting (red) the radiative losses from optically thin plasma in the unshocked stream.