Extended Data Fig. 8: High-resolution HST/STIS/E230M transmission spectrum of WASP- 178b.
From: UV absorption by silicate cloud precursors in ultra-hot Jupiter WASP-178b
NUV high-resolution transit spectra of WASP-178b (with 1-σ uncertainties) compared to WASP-121b around the Fe II (a) and Mg II (b) lines. Shown are the spectra from STIS E230M for WASP-178b (red), WASP-121b17 (grey), and the low resolution UVIS spectra (blue). While WASP-121b shows strong Fe II and Mg II absorption features, the WASP-178b E230M spectra is consistent with the broadband NUV continuum with no Fe II or Mg II.
