Fig. 6. Time series of line profiles in Cyg as a function of phase for (left to right) H₂ 1-0 S(1), CO 2-0 R(21), H₂ 1-0 S(7), and Ti I 4488 cm^-1. The dotted line marks the center-of-mass velocity. The arrows above the spectrum locate the CO v=3 photospheric velocity. Phase is labeled under the S(1) spectrum. Note the emission at phase 0.83 and 0.98 in the S(1) and Ti lines. Time increases upward.