Rate coefficients for rotationally inelastic collisions of CO with H-2

We have performed quantum-scattering calculations to determine inelastic ra te coefficients of the astrophysically important collision system CO-H-2. W e have used a modified version of the most recent potential-energy surface by Jankowski and Szalewicz (J. Chem. Phys. 108, 3554 (1998)), which has bee n proven to be superior to a previous potential surface by comparison with experimental pressure broadening data. In contrast to previous studies we f ind that inelastic rates with DeltaJ = 2 for CO are smaller than those with DeltaJ = 1.