Image Details
Caption: Figure 2.
Example syntheses of the Th II line in J1459−3852 (left) and J1521−0607 (right). The black points show the spectrum, the solid lines show the best-fit syntheses, and the shaded regions show abundance uncertainties. The dashed gray lines show the synthesis with zero abundance for the line of interest.
© 2026. The Author(s). Published by the American Astronomical Society.