Quantum Calculation of Inelastic CO Collisions with H. II. Pure
  Rotational Quenching of High Rotational Levels
  Carbon monoxide is a simple molecule present in many astrophysical
environments, and collisional excitation rate coefficients due to the dominant
collision partners are necessary to accurately predict spectral line
intensities and extract astrophysical parameters. We report new quantum
scattering calculations for rotational deexcitation transitions of CO induced
by H using the three-dimensional potential energy surface~(PES) of Song et al.
(2015). State-to-state cross sections for collision energies from 10$^{-5}$ to
15,000~cm$^{-1}$ and rate coefficients for temperatures ranging from 1 to
3000~K are obtained for CO($v=0$, $j$) deexcitation from $j=1-45$ to all lower
$j'$ levels, where $j$ is the rotational quantum number. Close-coupling and
coupled-states calculations were performed in full-dimension for $j$=1-5, 10,
15, 20, 25, 30, 35, 40, and 45 while scaling approaches were used to estimate
rate coefficients for all other intermediate rotational states. The current
rate coefficients are compared with previous scattering results using earlier
PESs. Astrophysical applications of the current results are briefly discussed.
