$V_2$ – dependence of rotational corrections to the effective dipole moment of Н$_{2}$О molecule and its effect on line broadening and line shift coefficients

The dependence of rotational correction terms of the effective dipole moment of Н$_{2}$О molecule on the vibrational quantum number $v_2$ which corresponds to the large amplitude motion is obtained in the numerical calculations. Different dipole surfaces of Н$_{2}$О molecule as well as different intra-molecular potentials were used. The effect of the rotational corrections on the calculated line broadening and line shifts by Ar, Kr, H$_2$ and He pressure was analyzed. It is shown that this effect is significant for a shifting of pure rotational lines and rovibrational lines for which the difference in rotational quantum number $K_a$ from the initial and final states of the transition greater (or equal) to three.