2001ApJ...559..402G

Observations of the H30α (231 GHz) and H35α (147 GHz) recombination lines from MWC 349–we assume from the MWC 349A star–from 1997 May through 2000 June show variations in the intensities and radial velocities of the strongly masing, double-peaked lines on scales of a few weeks to a few months. The data include a few observations of the H40α (99 GHz) line during this period. We examine intensities, widths, and radial velocities of the line components and intensities of the free-free continuum emission. We detect both positive and negative correlations between the variations of some of these parameters, as well as a lack of correlation. We consider these results in terms of a differentially rotating, inhomogeneous disk viewed edge-on, having a considerable radial component of gas motion and surrounding a central object with strong, variable UV emission.