ALMA Titan wind velocity maps for CH3CN, HC3N and HNC (derived from observations on August 2016 and May 2017)

These FITS files contain wind velocities (in m/s) as a function of angular offset (in RA/dec.) from the center of Titan's disk, derived from ALMA observations of CH3CN, HC3N and HNC in August 2016 and May 2017. We followed the method of Lellouch et al. (2019) to determine radial velocities (along the line of sight) for each gas as a function of spatial coordinate in the ALMA images. This involved extracting individual spectra from the data cubes and fitting the emission lines with Gaussians to determine their Doppler shifts.