Image Details
Caption: Figure 5.
Same as Figure 4 but for the Na I doublet lines (left panels) and K I λ7701 Å (right panels). The white vertical bands are the masked regions due to interstellar medium absorption. Only a fit for Na I D2 is presented. A shallow dip can be seen in the result of K I, which might be due to atmospheric absorption.
© 2026. The Author(s). Published by the American Astronomical Society.