VizieR Online Data Catalog: IK Tau millimeter IRAM-30m line survey (Velilla Prieto+, 2017)

These tables include the energy levels and polynomial coefficients needed to derive the rate coefficients of SO2. Each energy level in so2level.dat is uniquely identified by a identifier number used in the file so2pcoef.dat. File so2pcoef.dat contains polynomial coefficients that fit the decimal logarithm of the collisional rates between two levels computed by Balanca et al. (2016MNRAS.460.3766B). A sixth order polynomial reproduces with a relative error below 30% all rates between 20 and 1000K for the 410 energy levels used in the calculations. (4 data files).