Image Details
Caption: Figure 5.
Evolution of the HCN (NOEMA: J = 3–2; APEX: J = 4–3) spectral line in comet A1. The black line depicts the extracted spectra, while the red line represents our modeled data. NOEMA spectra shown here are from the ON–OFF observations.
© 2026. The Author(s). Published by the American Astronomical Society.