Collisional depolarization of molecular lines. Application to the SiO+H isotropic collisions

International audienceThis paper reports the first theoretical study on the collisional depolarization and polarization transfer for rovibrational levels of diatomic molecules in the infinite-order-sudden approximation. As an application, we compute depolarization and polarization transfer rates for rotational levels J = 1,..., 99 within the vibrational quantum numbers v = 0, 1, 2, 3 of the SiO molecules in collisions with neutral hydrogen atoms for temperatures 40