Unclear correspondence between UV stellar and FIR nebular morphology in JADES-GS-z14-0

Ascertain whether the rest-frame UV stellar emission and the rest-frame far-infrared nebular emission in JADES-GS-z14-0 share the same morphological parameters (Sérsic index and axis ratio), to enable consistent use of structural measurements when interpreting [OIII] 88 µm line widths for dynamical mass estimation.

Background

The paper derives the dynamical mass using the [OIII] 88 µm line width together with UV-derived structural parameters (Sérsic index and axis ratio). This approach assumes comparable morphology between the UV stellar light and FIR nebular emission.

The authors explicitly note that this assumption may not hold, prompting adoption of a range of morphological parameters. Establishing the correspondence between UV and FIR morphologies would remove a key systematic in the dynamical mass estimate.