Image Details
Caption: Figure 2.
Demonstration of Moffat function fits to the CH3CN (JK = 192–182) spectra obtained on 2022-06-10. The continuum-subtracted ALMA observations were extracted at the east and west equatorial limbs (red and blue curves, respectively). Moffat fits used to derive the Doppler velocities are overlaid as dotted black curves; vertical dashed lines indicate the best-fitting Doppler shifts associated with each fit.
© 2026. The Author(s). Published by the American Astronomical Society.